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GOODA.VN - THU VIỆN SÁCH QUÝ
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LӠ, 1Ï, ĈҪU Các em h͕c sinh thân m͇n! Kì thi THPT QuӕF JLD ÿDQJ ÿӃQ JҫQ ÿӭQJ WUѭӟF QJѭӥQJ FӱD TXDQ WUӑQJ Fӫa cuӝF ÿӡi PuQK FKҳc chҳQ Wҩt cҧ các em hӑF VLQK N ÿDQJ JҩS U~W FKXҭQ Eӏ Yj Qӛ lӵF NKҧ QăQJ FӫD PuQK ÿӇ KRjQ WKLӋQ KjQK WUDQJ WUL WKӭF ÿӇ có thӇ EѭӟF QKӳQJ EѭӟF [D QKҩW WURQJ KjQK WUuQK FKLQK SKөc giҩc Pѫ FӫD PuQK /j PӝW JLiR YLrQ KҵQJ QJj\ ÿӭQJ WUrQ Eөc giҧQJ OjP EҥQ YӟL QKӳQJ FRQ FKӳ Yj ÿӗQJ KjQK F QJ Yӟi giҩF Pѫ Fӫa tӯQJ Oӟp hӑF WUz Qӕi tiӃS QKDX EѭӟF TXD FiQK FәQJ WUѭӡQJ WKҫ\ cô hiӇu QKӳQJ EăQ NKRăQ Yj OR kX FӫD FiF HP ÿһF ELӋt là các em hӑF VLQK N WURQJ JLDL ÿRҥQ QѭӟF U~W Qj\ /j NKyD KӑF ÿҫX WLrQ iS GөQJ ÿәi mӟi vӅ QӝL GXQJ WKL 7+37 4XӕF JLD chҳc hҷQ các em phҧL ÿӕi mһt vӟL NK{QJ tW NKy NKăQ NKy NKăQ OӟQ QKҩW Oj NKӕL OѭӧQJ NLӃQ WKӭF NKәQJ Oӗ cӫa mӛL P{Q EDR Jӗm NLӃQ WKӭc cӫD ED QăP OӟS OӟS OӟS F QJ YӟL QKӳQJ \rX Fҫu mӟi vӅ KuQK WKӭF UD ÿӅ QӝL GXQJ Yj FiF GҥQJ WKӭc mӟL WURQJ FiF FkX KӓL ĈһF ELӋW ÿӕi vӟL P{Q WRiQ Yұ\ QrQ ÿLӅu các em cҫQ QKҩW O~F Qj\ Oj Pӝt QJѭӡi thҫ\ JL~S HP WyP JӑQ OҥL Ot WKX\Ӄt mӝW FiFK ORJLF GӉ QKӟ GӉ hiӇu và mӝW QJѭӡL EҥQ ÿӗQJ KjQK JL~S HP JLҧL TX\Ӄt mӑL YѭӟQJ PҳF NKL OjP EjL WұS 7Kҩu hiӇX PRQJ PXӕQ ÿy FiF WKҫ\ F{ ÿm NӃt hӧS F QJ &&%RRN [XҩW EҧQ FXӕQ sách Ôn luyên thi tr̷c nghi͏m THPTQG môn Toán 2019 ÿӇ ÿӗQJ KjQK F QJ FiF HP WUrQ FKһQJ ÿѭӡQJ FKLQK SKөF Nu WKL ÿӏQK PӋQK Vҳp tӟL ĈӕL WѭӧQJ FӫD FXӕQ ViFK KѭӟQJ WӟL Oj WҩW Fҧ QKӳQJ EҥQ ÿӝF JLҧ Fy QKX FҫX WuP NLӃP Yj WUDX GӗL NLӃQ WKӭF WәQJ KӧS WK{QJ WLQ ĈһF ELӋW Oj FiF Vƭ Wӱ FKXҭQ Eӏ WKDP JLD Nu WKL 7+374* QăP ErQ FҥQK ÿy FiF HP KӑF VLQK OӟS YүQ Fy WKӇ Vӱ GөQJ FXӕQ ViFK QKѭ PӝW QJXӗQ WKDP NKҧR Eә tFK 9ӟL PөF WLrX FXQJ FҩS NLӃQ WKӭF PӝW FiFK KӋ WKӕQJ ÿҫ\ ÿӫ Yj GӉ KLӇX QKҩW FXӕQ ViFK Qj\ FzQ WUDQJ Eӏ FKR FK~QJ WD VNLOO Vӱ GөQJ Pi\ WtQK &$6,2 Yj KӋ WKӕQJ KyD FiF F{QJ WKӭF WtQK QKDQK ÿӇ Fy WKӇ U~W QJҳQ KѫQ WKӡL JLDQ OjP EjL 1KӳQJ ÿѫQ Yӏ NLӃQ WKӭF Oê WKX\ӃW SKӭF WҥS VӁ ÿѭӧF WәQJ KӧS ÿҫ\ ÿӫ QJҳQ JӑQ GӉ KLӇX GӉ QKӟ 1KӳQJ ÿѫQ Yӏ NLӃQ WKӭF Oê WKX\ӃW ÿѭӧF WUuQK Ej\ Fy KӋ WKӕQJ JL~S JKL QKӟ GӉ GjQJ NK{QJ Eӏ OүQ OӝQ JLӳD FiF ÿѫQ Yӏ NLӃQ WKӭF Fy PӕL OLrQ KӋ KD\ WѭѫQJ ÿӗQJ WUrQ PӝW SKѭѫQJ GLӋQ QjR ÿy 5qQ OX\ӋQ Wѭ GX\ WURQJ JLҧL QKDQK WUҳF QJKLӋP P{Q 7RiQ %rQ FҥQK ÿy FXӕQ ViFK Qj\ FzQ FXQJ FҩS FKR FiF HP FiF EjL WұS PүX YӟL WҩW Fҧ FiF GҥQJ EjL Fy WKӇ JһS Yj SKѭѫQJ SKiS JLҧL OӡL JLҧL FKL WLӃW ÿһF ELӋW Oj SKѭѫQJ SKiS JLҧL QKDQK YӟL PӝW Vӕ GҥQJ EjL NKy JL~S FiF HP NK{QJ FzQ Eӥ QJӥ WUѭӟF EҩW Fӭ GҥQJ EjL NLӇX EjL QjR 7URQJ FXӕQ ViFK Qj\ FK~QJ W{L FzQ ÿѭD UD PӝW KӋ WKӕQJ EjL WұS Wӵ OX\ӋQ Fy ÿiS iQ Yj KѭӟQJ GүQ JLҧL ÿӕL YӟL PӝW Vӕ GҥQJ EjL WұS ÿһF ELӋW Yj YҩQ ÿӅ SKiW VLQK JL~S FiF HP FӫQJ Fӕ Yj YұQ GөQJ NLӃQ WKӭF FNJQJ QKѭ SKѭѫQJ SKiS JLҧL ÿm ÿѭӧF KӑF Yj JKL QKӟ VkX KѫQ FiF NLӃQ WKӭF ÿm KӑF 1JRjL UD WURQJ FXӕQ ViFK Qj\ FzQ WtFK KӧS PӝW Vӕ WLӋQ tFK ÿL NqP Ĉk\ FNJQJ Oj PӝW ѭX ÿLӇP YѭӧW WUӝL FӫD FXӕQ ViFK OjP FKR Qy NK{QJ FKӍ ÿѫQ WKXҫQ Oj PӝW FXӕQ ViFK Pj FzQ Oj PӝW QJѭӡL EҥQ PӝW QJѭӡL ÿӗQJ KjQK YӟL FiF HP WUѭӟF WҩW Fҧ QKӳQJ NKy NKăQ YѭӟQJ PҳF WURQJ TXi WUuQK KӑF 9LGHR EjL JLҧQJ Kӛ WUӧ III
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/ê WKX\ӃW WәQJ KӧS KӋ WKӕQJ OҥL NLӃQ WKӭF Oê WKX\ӃW PӝW FiFK ORJLF [Ri\ VkX YjR FiF SKҫQ Oê WKX\ӃW WUӑQJ WkP VӁ UD WURQJ ÿӅ WKL 7+374* JL~S FiF HP PӝW OҫQ QӳD QҳP YӳQJ Yj KLӇX EҧQ FKҩW WRiQ KӑF &KӳD FiF EjL WұS Wӵ OX\ӋQ FӫD FKѭѫQJ FKӑQ OӑF FiF EjL WұS KD\ NKy Fy YҩQ ÿӅ FҫQ SKkQ WtFK JLҧL WKtFK 1KӳQJ SKѭѫQJ SKiS JLҧL EjL WұS PҽR JLҧL QKDQK NKL OjP EjL JL~S ÿҥW ÿLӇP Vӕ WӕL ÿD WURQJ Nu WKL 1KyP NtQ Kӛ WUӧ JLҧL ÿiS FiF WKҳF PҳF +Ӌ WKӕQJ WKL WKӱ ÿҫ\ ÿӫ .LӃQ WKӭF FӫD Fҧ ED QăP KӑF ÿѭӧF WәQJ KӧS OҥL WKjQK FiF SKҫQ OӟQ WLӃS ÿy VӁ Oj FiF FKӫ ÿӅ OӟS Fy OLrQ TXDQ Eә WUӧ FKR SKҫQ NLӃQ WKӭF WUӑQJ WkP FӫD OӟS 7URQJ PӛL FKӫ ÿӅ QӝL GөQJ EDR JӗP KDL SKҫQ Oê WKX\ӃW Yj EjL WұS EjL WұS PүX Yj EjL WұS Wӵ OX\ӋQ 7URQJ ÿy SKҫQ EjL WұS PүX ÿL NqP YӟL QKӳQJ Nƭ QăQJ EҩP Pi\ WtQK &$6,2 PӝW FiFK KӋ WKӕQJ ÿҫ\ ÿӫ FiF GҥQJ EjL ĈL NqP YӟL ÿy Oj KӋ WKӕQJ SKѭѫQJ SKiS JLҧL EjL WұS ÿL NqP Yt Gө PLQK KӑD Wӯ GӉ ÿӃQ NKy ÿѭӧF JLҧL FKL WLӃW JL~S FiF HP ELӃW YұQ GөQJ SKѭѫQJ SKiS YӯD ÿѭӧF KӑF YjR JLҧL EjL WұS &XӕL F QJ Oj FiF EjL WұS WәQJ KӧS WKӵF KjQK OX{Q QKӳQJ Ju YӯD ÿѭӧF KӑF *ӗP KDL SKҫQ FKtQK PhҫQ 3KҫQ ÿҥi sӕ và giҧL WtFK PhҫQ +uQK Kӑc VӟL QKӳQJ ѭX ÿLӇm ҩ\ FK~QJ W{L PRQJ UҵQJ Ôn luyên thi tr̷c nghi͏m THPTQG môn Toán 2019 sӁ ÿHP ÿӃQ FKR FiF EҥQ QJXӗQ Fҧm hӭQJ Kӑc tұS Yj ÿӗQJ KjQK F QJ FiF em hӑF VLQK WURQJ KjQK WUuQK FKLQK SKөF WUL WKӭc và là tài liӋX WKDP NKҧo hӳX tFK FKR FiF EҥQ ÿӗQJ QJKLӋS WURQJ TXi WUuQK giҧQJ Gҥ\ 7URQJ TXi WUuQK ELrQ VRҥQ FK~QJ W{L FNJQJ NK{QJ WKӇ WUiQK NKӓL QKӳQJ thiӃu sót UҩW PRQJ QKұQ ÿѭӧc sӵ ÿyQJ JyS TXê EiX Wӯ EҥQ ÿӑc gҫQ [D FiF WKҫ\ F{ FNJQJ QKѭ FiF HP KӑF VLQK WKkQ PӃQ ÿӇ FK~QJ W{L KRjQ WKLӋQ FXӕQ ViFK KѫQ WURQJ QKӳQJ OҫQ WiL EҧQ WLӃS WKHR Xin chân thành c̫P ˯Q
IV
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MӨC LӨC PHҪ1 ĈҤI SӔ VÀ GIҦI TÍCH ..................................................... 1 Chӫ ÿӅ 1. MӋQK ÿӅ , tұp hӧp, hàm sӕ ................................................................................... 2 &KX\rQ ÿӅ 0ӋQK ÿӅ Wұp hӧp 2 &KX\rQ ÿӅ +jP Vӕ EұF QKҩW KjP Vӕ Eұc hai 11 Chӫ ÿӅ 3KѭѫQJ WUuQK KӋ SKѭѫQJ WUuQK EҩW ÿҷQJ WKӭF Yj EҩW SKѭѫQJ WUuQK ............. 24 &KX\rQ ÿӅ 3KѭѫQJ WUuQK – hӋ SKѭѫQJ WUuQK 24 &KX\rQ ÿӅ %ҩW ÿҷQJ WKӭc – EҩW SKѭѫQJ WUuQK 40 Chӫ ÿӅ 3. Hàm sӕ OѭӧQJ JLiF – 3KѭѫQJ WUuQK OѭӧQJ JLiF ................................................ 48 &KX\rQ ÿӅ &{QJ WKӭF OѭӧQJ JLiF 48 &KX\rQ ÿӅ +jP Vӕ OѭӧQJ JLiF 54 &KX\rQ ÿӅ 3KѭѫQJ WUuQK OѭӧQJ JLiF 63 Chӫ ÿӅ 4. Tә hӧp – ;iF VXҩt ............................................................................................... 76 &KX\rQ ÿӅ 4X\ WҳF ÿӃP +RiQ Yӏ &KӍQK KӧS 7ә hӧp 76 &KX\rQ ÿӅ ;iF VXҩt 89 &KX\rQ ÿӅ 1Kӏ thӭF 1HZWRQ 98 Chӫ ÿӅ 5. Dãy sӕ – *LӟL Kҥn – Ĉҥo hàm .......................................................................... 108 &KX\rQ ÿӅ 'm\ Vӕ &ҩp sӕ cӝQJ – cҩp sӕ QKkQ 108 &KX\rQ ÿӅ *Lӟi hҥQ Gm\ Vӕ 122 &KX\rQ ÿӅ *Lӟi hҥQ KjP Vӕ +jP Vӕ OLrQ Wөc 129 &KX\rQ ÿӅ Ĉҥo hàm 141 &KX\rQ ÿӅ 3KѭѫQJ WUuQK WLӃS WX\ӃQ 153 Chӫ ÿӅ 6. ӬQJ GөQJ ÿҥR KjP ÿӇ khҧR ViW KjP Vӕ........................................................... 161 &KX\rQ ÿӅ 7tQK ÿѫQ ÿLӋu cӫa hàm sӕ 161 V
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&KX\rQ ÿӅ &ӵF WUӏ cӫa hàm sӕ 175 &KX\rQ ÿӅ *Li WUӏ lӟQ QKҩW JLi WUӏ QKӓ QKҩt cӫa hàm sӕ 191 &KX\rQ ÿӅ 7LӋm cұQ FӫD ÿӗ thӏ hàm sӕ 199 &KX\rQ ÿӅ Ĉӗ thӏ hàm sӕ 205 Chӫ ÿӅ 7. Hàm sӕ PNJ KjP Vӕ ORJDULW Yj KjP Vӕ ONJ\ WKӯD.............................................. 219 &KX\rQ ÿӅ /NJ\ WKӯa và logaULW 219 &KX\rQ ÿӅ +jP Vӕ PNJ - hàm sӕ ONJ\ WKӯa – hàm sӕ ORJDULW 226 &KX\rQ ÿӅ 3KѭѫQJ WUuQK PNJ – SKѭѫQJ WUuQK ORJDULW 240 &KX\rQ ÿӅ %ҩW SKѭѫQJ WUuQK PNJ – EҩW SKѭѫQJ WUuQK ORJDULW 254 Chӫ ÿӅ 1JX\rQ KjP – Tích phân ................................................................................. 261 &KX\rQ ÿӅ 1JX\rQ KjP 261 &KX\rQ ÿӅ 7tFK SKkQ 274 &KX\rQ ÿӅ ӬQJ GөQJ WtFK SKkQ 286 Chӫ ÿӅ 9. Sӕ phӭc ............................................................................................................... 295 &KX\rQ ÿӅ &iF SKpS WRiQ WUrQ Wұp hӧp sӕ phӭc 295 &KX\rQ ÿӅ 7ұp hӧS ÿLӇP ELӇX GLӉQ Vӕ phӭc 305
PHҪN 2: HÌNH HӐC..................................................................... 315 Chӫ ÿӅ 9HFWѫ WtFK Y{ KѭӟQJ FӫD KDL YHFWѫ Yj ӭQJ GөQJ ........................................... 316 &KX\rQ ÿӅ 9HFWѫ Yj FiF SKpS WRiQ YHFWѫ 316 &KX\rQ ÿӅ +Ӌ WUөc tӑD ÿӝ 323 &KX\rQ ÿӅ +Ӌ thӭF OѭӧQJ WURQJ WDP JLiF 330 Chӫ ÿӅ 3KѭѫQJ SKiS WӑD ÿӝ WURQJ Pһt phҷQJ............................................................. 335 &KX\rQ ÿӅ 3KѭѫQJ WUuQK ÿѭӡQJ WKҷQJ 335 &KX\rQ ÿӅ 3KѭѫQJ WUuQK ÿѭӡQJ WUzQ 346 &KX\rQ ÿӅ 3KѭѫQJ WUuQK ÿѭӡQJ HOLS 353
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Chӫ ÿӅ 3KpS GӡL KuQK Yj SKpS ÿӗQJ GҥQJ WURQJ Pһt phҷQJ ...................................... 359 &KX\rQ ÿӅ 3KpS ELӃQ KuQK SKpS WӏQK WLӃQ 359 &KX\rQ ÿӅ 3KpS ÿӕi xӭQJ WUөF ÿӕi xӭQJ WkP 365 &KX\rQ ÿӅ 3KpS TXD\ Yj SKpS GӡL KuQK 372 &KX\rQ ÿӅ 3KpS Yӏ tӵ SKpS ÿӗQJ GҥQJ 377 Chӫ ÿӅ ĈѭӡQJ WKҷQJ Yj Pһt phҷQJ WURQJ NK{QJ JLDQ 4XDQ KӋ VRQJ VRQJ .............. 383 &KX\rQ ÿӅ ĈҥL FѭѫQJ YӅ ÿѭӡQJ WKҷQJ Yj Pһt phҷQJ 383 &KX\rQ ÿӅ +DL ÿѭӡQJ WKҷQJ FKpR QKDX Yj KDL ÿѭӡQJ WKҷQJ VRQJ VRQJ 391 &KX\rQ ÿӅ ĈѭӡQJ WKҷQJ Yj Pһt phҷQJ VRQJ VRQJ 397 &KX\rQ ÿӅ +DL Pһt phҷQJ VRQJ VRQJ 403 Chӫ ÿӅ 9HFWѫ WURQJ NK{QJ JLDQ 4XDQ KӋ YX{QJ JyF WURQJ NK{QJ JLDQ.................... 407 &KX\rQ ÿӅ 9HFWѫ WURQJ NK{QJ JLDQ 407 &KX\rQ ÿӅ +DL ÿѭӡQJ WKҷQJ YX{QJ JyF 415 &KX\rQ ÿӅ ĈѭӡQJ WKҷQJ YX{QJ JyF Yӟi mһt phҷQJ 423 &KX\rQ ÿӅ +DL Pһt phҷQJ YX{QJ JyF 433 &KX\rQ ÿӅ .KRҧQJ FiFK 442 Chӫ ÿӅ 6. KhӕL ÿD GLӋn ....................................................................................................... 455 &KX\rQ ÿӅ .KӕL ÿD GLӋQ 455 &KX\rQ ÿӅ 7KӇ WtFK NKӕi chóp 460 &KX\rQ ÿӅ 7KӇ WtFK NKӕL OăQJ WUө 473 &KX\rQ ÿӅ 7Ӎ lӋ thӇ WtFK 481 Chӫ ÿӅ 7. MһW QyQ PһW WUө, mһt cҫX................................................................................ 488 &KX\rQ ÿӅ 0һW QyQ – KhӕL QyQ 488 &KX\rQ ÿӅ 0һW WUө – KhӕL WUө 498 &KX\rQ ÿӅ 0һt cҫu – Khӕi cҫu 508
VII
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Chӫ ÿӅ 3KѭѫQJ SKiS WӑD ÿӝ WURQJ NK{QJ JLDQ ............................................................ 520 &KX\rQ ÿӅ +Ӌ WUөc tӑD ÿӝ WURQJ NK{QJ JLDQ 520 &KX\rQ ÿӅ 3KѭѫQJ WUuQK Pһt phҷQJ 532 &KX\rQ ÿӅ 3KѭѫQJ WUuQK ÿѭӡQJ WKҷQJ 545 &KX\rQ ÿӅ 3KѭѫQJ WUuQK Pһt cҫu 564
VIII
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CHÓŞ Ĉӄ 8
NGUYĂ&#x160;N HĂ&#x20AC;M, TĂ?CH PHĂ&#x201A;N VĂ&#x20AC; ÓŹNG DÓ¨NG TĂ?CH PHĂ&#x201A;N &+8<Ă&#x2021;1 Ä&#x2C6;Ó&#x201E; 1
NGUYĂ&#x160;N HĂ&#x20AC;M A. KIÓ&#x201A;N THÓŹC TRÓ?NG TĂ&#x201A;M 1. NguyĂŞn hĂ m Cho hĂ m sÓ&#x2022; y
f x [iF ĂżÓ?nh trĂŞn tŇąp K (K lĂ khoҧQJ ĂżRŇĽn hay nÓąa khoҧng).
Ä&#x2C6;Ó?QK QJKĆD HĂ m sÓ&#x2022; F x ĂżŃÓ§c gÓ&#x2018;i lĂ nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; y
F c x
Ä&#x2C6;Ó?nh lĂ 1
Ä&#x2C6;Ó?nh lĂ 2
f x trĂŞn K nÓ&#x192;u
f x vÓ&#x;i mÓ&#x2018;i x thuÓ?c K.
NÓ&#x192;u F x lĂ mÓ?t nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; f x trĂŞn K thĂŹ vÓ&#x;i mÓ&#x203A;i hŇľng sÓ&#x2022; C, hĂ m sÓ&#x2022; G x
F x C FÇ&#x160;QJ Oj PÓ?t nguyĂŞn hĂ m cÓŤa f x trĂŞn K.
NÓ&#x192;u F x lĂ mÓ?t nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; f x trĂŞn K thĂŹ mÓ&#x2018;i nguyĂŞn hĂ m cÓŤa f x trĂŞn K ĂżÓ&#x2026;u cĂł dŇĽng F x C vÓ&#x;i C lĂ hŇľng sÓ&#x2022;.
Ä&#x2C6;Ó?nh lĂ 3
MÓ&#x2018;i hĂ m sÓ&#x2022; f x liĂŞn tÓŠc trĂŞn K ĂżÓ&#x2026;u cĂł nguyĂŞn hĂ m trĂŞn K.
TĂnh chŇŠt
Âł f c x dx f x C YÓ&#x;L C Oj KŇľQJ VÓ&#x2022; x Âł > f ( x) r g ( x) @dx Âł f ( x)dx r Âł g ( x)dx . x Âł kf ( x)dx k Âł f ( x)dx YÓ&#x;L k z 0 . x NÓ&#x192;u F x Fy ÿҼo hĂ m thĂŹ Âł d F x F x C . x
2. Bҧng nguyĂŞn hĂ m 1JX\rQ KjP FiF KjP VÓ&#x2022; WKŃÓĄQJ JŇťS
Âł 0dx
C
1JX\rQ KjP PÓŁ UÓ?QJ
1
Âł x a x b dx
1 x a ln C a b x b
261
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Âł dx Âł1dx
xD 1 C, D 1
D Âł x dx
1
Âłx
x C
(D z 1)
Âł
2
1 dx a2 1 2
x a
2
1
1 C x
Âł ax b
Âł xdx
ln x C
Âł ax bdx
Âł e dx
ex C
Âłe
Âłx
2
dx
1
x
ax C (0 a z 1) ln a
x Âł a dx
1
ax b
dx
mx n Âł a dx
2
1 x arctan C a a
dx ln x x 2 a 2 C
dx
1 C , a z 0
a ax b
1 ln ax b C , a z 0
a 1 ax b e C , (a z 0) a a mx n C , 0 a z 1
m ln a
Âł cos xdx
sin x C
Âł cos(ax b)dx
1 sin(ax b) C , a z 0
a
Âł sin xdx
cos x C
Âł sin(ax b)dx
1 cos(ax b) C , a z 0
a
1
Âł cos
2
x
dx
tan x C
1
1 tan ax b C , a z 0
a
Âł cos ax b dx 2
1 Âł sin 2 xdx cot x C
Âł sin ax b dx
1
1 co t ax b C , a z 0
a
Âł tan xdx
ln cos x C
Âł tan ax b dx
1 ln cos ax b C , a z 0
a
Âł co t xdx
ln sin x C
Âł co t ax b dx
1 ln sin ax b C , a z 0
a
2
B. CĂ C DҤNG BĂ&#x20AC;I TŇ°P DŇĽQJ 1JX\rQ KjP FŃŤ Eҧn 3KŃŃŤQJ SKiS JLҧL Ă p dÓŠng cĂĄc cĂ´ng thÓc trong bҧQJ QJX\rQ KjP FŃŤ Eҧn 2. VĂ dÓŠ mŇŻu
262
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GOODA.VN - THU VI áť&#x2020;N SĂ CH QUĂ? VĂ dÓŠ 1: Cho hĂ m sÓ&#x2022; f x
2 x3 3 C. 3 2x LÓĄi giҧi chi tiÓ&#x192;t
A.
CĂĄch 1:
Âł
2 x4 3 . TĂnh nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; f x . x2
B.
2 x3 3 C. 3 x
2 x4 3 Âł x 2 dx
f x dx
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C. 2 x 3
§ 2 3¡ ³ ¨Š 2 x x 2 ¸š dx
3 C. x
D.
2 x3 3 C. 3 x
2 x3 3 C. 3 x
CĂĄch 2: SÓą dÓŠQJ Pi\ WtQK &DVLR
2 vĂ o hĂ m sÓ&#x2022; f x
%˹ͣc 1: Thay x
%˹ͣc 2: Sӹ dӊng SHIFT
35 2 x4 3 WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 2 4 x
8,75 .
d , x , . dx
Ä&#x2C6;iS iQ $ 1KŇąp
d § 2X 3 3 ¡ ¨ ¸ x 2 WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 7,625 , loŇĽL ĂżiS iQ $ dx Š 3 2X š
Ä&#x2C6;iS iQ % 1KŇąp
d § 2X 3 3 ¡ ¸ x 2 WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 7, 25 , loŇĽL ĂżiS iQ % ¨ dx Š 3 Xš
Ä&#x2C6;iS iQ & 1KŇąp
d § 3¡ 3 ¨ 2X ¸ x dx Š Xš
Ä&#x2C6;iS iQ ' 1KŇąp
d § 2X 3 3 ¡ ¸ x 2 WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 8,75 , chÓ&#x2018;Q ĂżiS iQ ' ¨ dx Š 3 Xš
2 WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 24,75 , loŇĽL ĂżiS iQ &
ChÓ&#x2018;n D. VĂ dÓŠ 2: HĂ m sÓ&#x2022; f x
x 2
x3
4 2 6. x x2 LÓĄi giҧi chi tiÓ&#x192;t
x 2
x
2
3
'R Ăży F x
cĂł nguyĂŞn hĂ m lĂ hĂ m F x %LÓ&#x192;W F 1 6 NKL Ăży F x Fy GŇĽQJ
B. ln x
A. ln x
f x
2
x2 4 x 4 x3
Âł f x dx Âł
4 2 4. x x2
VĂ dÓŠ 3: Cho F x
ax
2
dx dx dx 4Âł 2 4Âł 3 x x x
3035 . LÓĄi giҧi chi tiÓ&#x192;t
ln x
B. T
D. ln x
4 2 6. x x2
2018 x
3 x 1 e 2 x
4 2 C. x x2
4 2 12 . x x2
bx c e 2 x lĂ mÓ?t nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; f x
trĂŞn khoҧng f; f . TĂnh T A. T
4 2 12. x x2
1 4 4 2 3. x x x
MĂ F 1 6 Â&#x; C 12 GR Ăży F x ln x ChÓ&#x2018;n C.
C. ln x
2
a 2b 4c . 1007 .
C. T
5053 .
D. T
1011 .
263
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? VĂŹ F x
ax
2
bx c e 2 x lĂ mÓ?t nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; f x
khoҧng f; f QrQ WD Fy F x c
2018 x
2
3 x 1 e 2 x trĂŞn
f x , vÓ&#x;i mÓ&#x2018;i x Â? f; f .
Hay 2ax 2 x 2b 2a 2c b e 2 x
2018 x
2
3 x 1 e 2 x , vÓ&#x;i mÓ&#x2018;i x Â? f; f .
 °a 1009 Â2a 2018 ° 2021 ° ° . Ä&#x2C6;Ó&#x2014;ng nhŇŠt hÓ&#x2039; sÓ&#x2022; tD ĂżŃÓ§F ÂŽ2b 2a 3 Â&#x153; ÂŽb 2 ° 2c b 1 ° ÂŻ 2023 ° °Ě&#x201E;c 4
a 2b 4c
VŇąy T
§ 2021 ¡ § 2023 ¡ 1009 2. ¨ ¸ 4. ¨ ¸ 2 š 4 š Š Š
3035 .
ChÓ&#x2018;n A. VĂ dÓŠ 4: TĂŹm mÓ?t nguyĂŞn hĂ m F x cÓŤa hĂ m sÓ&#x2022; f x ax
F 1 4 ; f 1 0 .
b x2
x z 0
3x 2 3 7 . 4 2x 4
B. F x
3x 2 3 7 . 4 2x 4
3x 2 3 7 . 2 4x 4 LÓĄi giҧi chi tiÓ&#x192;t
D. F x
3x 2 3 1 . 2 2x 2
A. F x
C. F x
F x
Âł
f x dx
Âł ax
b dx x2
biÓ&#x192;t rŇľng F 1 1 ;
ax 2 b C. 2 x
3 Âa  °2 b C 1 °a 2  F 1 1 ° ° ° 3 °a ° Theo giҧ thiÓ&#x192;t ta cĂł hÓ&#x2039; ÂŽ F 1 4 Â&#x153; ÂŽ b C 4 Â&#x153; ÂŽb . 2 2 ° ° ° f 1 0
ÂŻ 7 °a b 0 ° ° °C 4 ÂŻ ÂŻ VŇąy hĂ m sÓ&#x2022; f x cĂł mÓ?t nguyĂŞn hĂ m lĂ F x
3x 2 3 7 . 4 2x 4
ChÓ&#x2018;n A. VĂ dÓŠ 5: GÓ&#x2018;i F x lĂ mÓ?t nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; f x
thÓc T A. T
2 x , thÓ&#x201C;a mĂŁn F 0
F 0 F 1 F 2 ... F 2017 . 1009.
22017 1 . ln 2
B. T
22017.2018 .
C. T
22017 1 . ln 2
LÓĄi giҧi chi tiÓ&#x192;t
264
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1 . TĂnh giĂĄ trÓ? biÓ&#x2021;u ln 2
D. T
22018 1 . ln 2
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? 7D Fy F x
Âł
f x dx
2x C . ln 2
x Âł 2 dx
MĂ F 0
1 1 Â&#x; C ln 2 ln 2
.KL Ăży T
F 0 F 1 F 2 ... F 2017
1 Â&#x;C ln 2
0 Â&#x; F x
2x . ln 2
20 2 22 22017 ... ln 2 ln 2 ln 2 ln 2 1 1 22018 . ln 2 1 2
22018 1 . ln 2
ChÓ&#x2018;n D.
DŇĽng 2: TĂŹm QJX\rQ KjP EŇľQJ SKŃŃŤQJ SKiS ĂżÓ&#x2122;L ELÓ&#x192;n sÓ&#x2022; 1. 3KŃŃŤQJ SKiS JLҧL
Âł f u du
NÓ&#x192;u
u x Fy ÿҼo hà m liên tӊc thÏ
F u C vĂ u
³ f ªu x ºŸ .uc x dx
F u C.
ChĂş Ă˝: CĂ´ng thÓc vi phân
f c x dx d f x
sin xdx d cos x d cos x
dx d x 1 d x 2 ... d x n
cos xdx d sin x
dx
1 d ax
a
1 d ax 1 ... a
1 d ax n
a
1 dx d ln x , e x dx d e x
x
2. VĂ dÓŠ mŇŻu
1
VĂ dÓŠ 1: NguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; A.
1 C. 2 4x
2 x 1
1
B.
2 x 1
3
lĂ
2
C.
C.
1 C. 4x 2
D.
1 C. 2 x 1
LÓĄi giҧi chi tiÓ&#x192;t
1
Âł 2 x 1
CĂĄch 1: I
2
dx Ä&#x2C6;Ó&#x2122;i biÓ&#x192;n 2 x 1 t Â&#x; dt
dt
Âł 2t
2dx 'R Ăży I
2
1 C . 2t
1 C . 2 4x
TrÓŁ lŇĽL SKpS ĂżÓ&#x2122;i biÓ&#x192;Q WD ĂżŃÓ§F I CĂĄch 2: SÓą dÓŠQJ YL SKkQ
I
1
Âł 2 x 1
2
dx
1
Âł 2 x 1
2
§ 2x 1 ¡ d¨ ¸ Š 2 š
1 1 d 2 x 1
Âł 2 2 x 1 2
1 1 . C 2 2x 1
1 C. 2 4x
ChÓ&#x2018;n A. VĂ dÓŠ 2: TĂŹm nguyĂŞn hĂ m sau I A.
3
3
x 1 4
4
C.
B.
4
Âł
3
3
x 1
x 1dx .
3
4
C.
C.
2
3
x 1 3
2
C.
D.
3
3
x 1 2
2
C. 265
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? LÓĄi giҧi chi tiÓ&#x192;t Ä&#x2C6;Ňťt t I
3
x 1 Â&#x; t3
2 Âł t.3t dt
x 1 Â&#x; 3t 2 dt
3 Âł 3t dt
dx.
3t 4 C. 4
3
TrÓŁ lŇĽL SKpS ĂżÓ&#x2122;i biÓ&#x192;Q WD ĂżŃÓ§F I
3
x 1
4
4
C.
ChÓ&#x2018;n A.
1 x5
Âł x 1 x dx
VĂ dÓŠ 3: NguyĂŞn hĂ m cÓŤa hĂ m I
S 10a b bŇľng A. 1. LÓĄi giҧi chi tiÓ&#x192;t
1
C. 0.
1 x5 2 x5 Âł x 1 x5 dx
I1
Âł x dx
I2
2 x 4 5 4 Âł x5 1dx Ä&#x2C6;Ňťt x 1 t Â&#x; 5 x dx
I2
Âł 5t dt
§ 1 2x4 ¡ ³ ¨Š x 1 x5 ¸š dx
D. 3. 1 2x4 dx Âł x Âł x5 1 dx
I1 I 2 .
ln x C .
2
2 ln t C 5
ln x
VŇąy I
cĂł dŇĽng a ln x 5 b ln 1 x 5 C .KL Ăży WÓ&#x2122;ng
B. 2.
1 x5 Âł x 1 x5 dx
CĂĄch 1: I
5
dt Â&#x; x 4 dx
dt . 5
2 ln x 5 1 C . 5
2 ln x 5 1 C 5
1 ln x 5 2ln 1 x 5 C . 5
1 ; b 2 Â&#x; 10a b 0. 5 CĂĄch 2: SÍľ dÍng vi phân
'R Ăży a
1 x x dx Âł x 1 x
5
I
5
4
5
5 5 1 1 x d x
5 Âł x 5 1 x 5
1 § 1 2 ¡ d x5
¨ 5 5 ¸ ³ 5 Š x 1 x š 6X\ UD a
5 5 5 ¡ 1 x 1 2 x d x 1 § x5 1 2 x5 ¨ ¸ d x5
³ ³ 5 5 5 5 5 5 5 5 ¨ x 1 x x 1 x ¸ x 1 x
Š š
1 ln x5 2ln 1 x5 C . 5
1 ; b 2 Â&#x; 10a b 0. 5
ChÓ&#x2018;n C.
DŇĽng 3: NguyĂŞn hĂ m tÓŻQJ SKŇŤn 3KŃŃŤQJ SKiS JLҧL NÓ&#x192;u u vĂ v lĂ hai hĂ m sÓ&#x2022; Fy ÿҼo hĂ m liĂŞn tÓŠc trĂŞn K thĂŹ Âł udv uv Âł vdu . 266
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? &iFK ËąX WLrQ ÿ̿W X
nhŇŠt log ln x QKu ĂżD ax b;a x 2 bx c WDP OŃÓ§ng sin x;cos x , tÓ PÇ&#x160; e x .a x .
VĂ dÓŠ Ä&#x2C6;Ňťt
Âł ln xdx
Âł x ln xdx
Âł x sin xdx
Âł xe dx
Âł e .cos xdx
u vdv
ln x dx
ln x xdx
x
x
cos x
sin xdx
e x dx
e x dx
x
x
2. VĂ dÓŠ mŇŻu VĂ dÓŠ 1: TĂŹm nguyĂŞn hĂ m sau Âł ln 4xdx .
x ln 4 x 1 C. 4 LÓĄi giҧi chi tiÓ&#x192;t
x ln 4 x 1 C. 2
B.
A.
C. x ln 4 x 1 C.
D. 2 x ln 4 x 1 C.
dx  Âu ln 4 x °du Â&#x; CĂĄch 1: Ä&#x2C6;Ňťt ÂŽ x . ÂŽ ÂŻdv dx °¯v x .KL Ăży Âł ln 4 xdx uv Âł vdu
1 x.ln 4 x Âł x. dx x
x.ln 4 x Âł 1dx
x ln 4 x 1 C .
CĂĄch 2: SÓą dÓŠQJ YL SKkQ
Âł ln 4 xdx
x.ln 4 x Âł xd ln 4 x
x.ln 4 x Âł x.
x ln 4 x 1 C.
x ln 4 x x C
4 dx 4x
x.ln 4 x Âł 1dx
Cåch 3: Sӹ dӊQJ Pi\ WtQK &DVLR %˹ͣc 1: Thay x
2 vĂ o hĂ m sÓ&#x2022; f x ln 4 x WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 2,07944 .
%˹ͣc 2: SÓą dÓŠng SHIFT Ä&#x2C6;iS iQ $ 1KŇąp
d , x , . dx
d §X ¡ ¨ ln 4X 1 ¸ x dx Š 4 š
2 WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 0,519 , khĂĄc kÓ&#x192;t quҧ cÓŤD EŃÓ&#x;c 1, loŇĽi
d §X ¡ ¨ ln 4X 1 ¸ x dx Š 2 š
2 WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 1,039 , khĂĄc kÓ&#x192;t quҧ cÓŤD EŃÓ&#x;c 1, loŇĽi
d X ln 4X 1 x dx
2 WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 2,07944 , bŇľng kÓ&#x192;t quҧ cÓŤD EŃÓ&#x;c 1
ĂżiS iQ $ Ä&#x2C6;iS iQ % 1KŇąp ĂżiS iQ % Ä&#x2C6;iS iQ & 1KŇąp chÓ&#x2018;Q ĂżiS iQ & ChÓ&#x2018;n C.
VĂ dÓŠ 2: Cho F x lĂ nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; y A.
1 2x 3 e x 2 . 2 4
B.
1 2x § 1¡ e ¨ x ¸. 2 Š 2š
1 x.e 2 x , biÓ&#x192;t F 0 . TĂŹm F x . 4 C.
1 2x § 1¡ 5 e ¨x ¸ . 2 Š 2š 4
1¡ 3 § D. 2e 2 x ¨ x ¸ . 2š 4 Š 267
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? LÓĄi giҧi chi tiÓ&#x192;t
Âdu dx Âu x ° Âł x.e dx Ä&#x2C6;Ňťt ÂŽÂŻdv e2 x dx Â&#x; ÂŽv 1 e2 x . °Ě&#x201E; 2
CĂĄch 1: I
I
2x
1 2x 1 xe Âł e 2 x dx 2 2
uv Âł vdu
F 0
1 0§ 1¡ .e ¨ 0 ¸ C 2 Š 2š
1 C 4
1 2x 1 2x xe e C 2 4 1 Â&#x;C 4
1 2x § 1¡ e ¨ x ¸ C. 2 Š 2š
0 'R Ăży F x
1 2x § 1¡ e ¨x ¸. 2 Š 2š
CĂĄch 2: SÓą dÓŠQJ YL SKkQ I
§ e 2 x ¡ x.e 2 x e2 x xd ¨ ¸ ³ Š 2 š 2 ³ 2 dx 1 2x 1 2x 1 2x § 1¡ xe e C e ¨ x ¸ C. 2 4 2 Š 2š
1 2x 1 xe Âł e 2 x dx 2 2
2x Âł xe dx
ChÓ&#x2018;n B.
DŇĽng 4: NguyĂŞn hĂ m cÓŤa mÓ?t sÓ&#x2022; hĂ m sÓ&#x2022; WKŃÓĄng gŇťS 3KŃŃŤQJ SKiS JLҧL 1.1. NguyĂŞn hĂ m hĂ m hÎ&#x2021;u tÍĄ 3KŃŃŤQJ SKiS JLҧi: f x lĂ hĂ m hÓłu tÓ? f x
P x
Q x
NÓ&#x192;u bŇąc cÓŤa P x lÓ&#x;Q KŃŤQ EŇąc cÓŤa Q x thĂŹ ta thÓľc hiÓ&#x2039;Q SKpS FKLD ĂżD WKÓc. NÓ&#x192;u bŇąc cÓŤa P x lÓ&#x;Q KŃŤQ EŇąc cÓŤa Q x vĂ Q x cĂł dŇĽng tĂch nhiÓ&#x2026;u nhân tÓą thĂŹ ta phân tĂch f x
thĂ nh tÓ&#x2122;ng cÓŤa nhiÓ&#x2026;u phân thÓc.
P x
A B . x a x b
( x a )( x b)
P x
2
( x m)(ax bx c) P x
( x a )( x b)
2
A Bx C . 2 x m ax bx c
A B C . x a x b ( x b) 2
CĂĄch tĂŹm A, B, C. CĂĄch 1: 4X\ ĂżÓ&#x2014;QJ ĂżÓ&#x2014;QJ QKŇŠW KÓ&#x2039; VÓ&#x2022; CĂĄch 2: 7KD\ ED JLi WUÓ? EŇŠW Nu FÓŤD x, OŇąS UD KÓ&#x2039; ED SKŃŃŤQJ WUuQK ED ŇQ ChĂş Ă˝: CĂĄc cĂ´ng thÓc tĂnh nhanh cÓŤa nguyĂŞn hĂ m hÓłu tÓ? 1 1 dx ln ax b C . 1. Âł ax b a 1 1 2. Âł dx C. 2 a ax b
ax b
268
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? 1
1 x a ln C a b x b
3.
Âł x a x b dx
4.
Âłx
5.
Âł x a x b x c dx
2
1 dx a2
1 ln x a ln x b C . a b
1 x arctan C . a a
P x
A.ln x a B.ln x b C.ln x c C0 .
7uP $ % & EĚšQJ FiFK VÍľ dÍQJ Pi\ WtQK &$6,2 I[ 913/86 A
B
C
P x
d X a X b X c x dx
a
P x
d X a X b X c x b dx P x
d X a X b X c x c dx
&$/& a ĂżŃÓ§F NÓ&#x192;W TXҧ FKtQK Oj JLi WUÓ? FÓŤD $
&$/& b
ĂżŃÓ§F NÓ&#x192;W TXҧ FKtQK Oj JLi WUÓ? FÓŤD %
&$/& c
ĂżŃÓ§F NÓ&#x192;W TXҧ FKtQK Oj JLi WUÓ? FÓŤD &
1.2. NguyĂŞn hĂ m hĂ m vĂ´ tÍĄ 3KŃŃŤQJ SKiS JLҧi 6Óą dÓŠQJ SKŃŃŤQJ SKiS ĂżÓ&#x2122;i biÓ&#x192;n sÓ&#x2022;, sÓą dÓŠng vi phân. MÓ?t sÓ&#x2022; dŇĽQJ ĂżÓ&#x2122;i biÓ&#x192;n sÓ&#x2022; ÿҝc biÓ&#x2039;W I [ cĂł chÓD
&iFK ĂżÓ&#x2122;i biÓ&#x192;n
a2 x2
x
a sin t ,
a2 x2
x
a tan t ,
x2 a2
x
1 § ¡ R¨ ¸ Š ( x a )( x b) š
a , cos t
2
S 2
dt d t
t Â? > 0; S @ \
t
§ ax b ¡ R ¨ x, m ¸ cx d š Š
S
S 2
S 2
^S ` 2
x a x b
t
m
ax b cx d
1JX\rQ KjP KjP OĚ Íťng giĂĄc 3KŃŃŤQJ SKiS JLҧL 7D VÓą GÓŠQJ FiF SKpS ELÓ&#x192;Q ĂżÓ&#x2122;L ĂżÓ&#x2021; ĂżŃD YÓ&#x2026; QJX\rQ KjP KjP FŃŤ EҧQ +jP VÓ&#x2022; Fy GŇĽQJ f x sin m x.cos n x
sin x. Ć&#x201D; 1Ó&#x192;X m OŇż n FKŇšQ ÿҝW t cos x Ć&#x201D; 1Ó&#x192;X m OŇż n OŇż ÿҝW t sinx KRŇťF t
Ć&#x201D; 1Ó&#x192;X m FKŇšQ n OŇż ÿҝW t
cosx .
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? Ć&#x201D; 1Ó&#x192;X m FKŇšQ n FKŇšQ ÿҝW t
tan x
&iF F{QJ WKÓF OŃÓ§QJ JLiF KD\ G QJ
1 cos 2 x 1 cos 2 x , cos 2 x , tan 2 x 2 2
sin 2 x
1 1 . cos 2 x
2. VĂ dÓŠ mŇŻu
Âł 2x
9t GÓŠ Cho I
2
dx b a.ln x 1 ln 2 x 1 C . TĂnh giĂĄ trÓ? cÓŤa P x 1 2
A. 1.
3 . 2
B.
C. 3.
2a b . D. 0.
LÓĄi giҧi chi tiÓ&#x192;t
Âł 2x
CĂĄch 1: I
2
dx x 1
1§ 1
2
¡
³ 3 ¨Š x 1 2 x 1 ¸š dx .KL ÿy a
1 2 , b nĂŞn P 3 3
1 1 ln x 1 ln 2 x 1 C . 3 3
2a b 0 .
CĂĄch 2: SÓą dÓŠng cĂ´ng thÓF WtQK QKDQK Âł I
Âł 2x
2
dx x 1
1 2 x 1 2 x 1
dx 3 Âł x 1 2 x 1
dx
Âł x 1 2 x 1
dx
Âł x 1 2 x 1
1 1 § 1 . ln x 1 ln x ¨ 2 1 1 Š 2 2
1 1 2x 1 ln x 1 ln C 3 3 2
1 2Âł
¡ ¸ C š
1
x a x b
1 ln x a ln x b C. a b
dx
dx 1 x 1 §¨ x ¡¸ 2š Š
1 2Âł
dx 1 x 1 §¨ x ¡¸ 2 š Š
1 1 1 ln x 1 ln x C 3 3 2
1 1 ln x 1 ln 2 x 1 C1 . 3 3
1 2 , b nĂŞn P 2a b 0 . 3 3 CĂĄch 3: SÓą dÓŠQJ Pi\ WtQK &DVLR .KL Ăży a
a b 2
1 &$/& 1 ĂżŃÓ§F NÓ&#x192;W TXҧ a d 2 2 x x 1 x 1 dx 1
d 2 x 2 x 1 x dx
.KL Ăży a
1 2
1 2 , b nĂŞn P 3 3
&$/&
1 2
ĂżŃÓ§F NÓ&#x192;W TXҧ
1 . 3 b 2
1 Â&#x;b 3
2 . 3
2a b 0 .
ChÓ&#x2018;n D.
270
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ?
2 x 1 4ln
A. I
2 x 1 4ln
C. I
dx . 2x 1 4
Âł
VĂ dÓŠ 2: TĂŹm nguyĂŞn hĂ m I
2 x 1 4 C.
B. I
2 x 1 4 C.
D. I
2 x 1 4ln
2 x 1 4ln
2 x 1 4 .
2x 1 4 .
LÓĄi giҧi chi tiÓ&#x192;t CĂĄch 1: Ä&#x2C6;Ňťt t
I
2x 1 Â&#x; t 2
tdt
Âłt 4 Âł
t 4 4 dt t 4
2 x 1 Â&#x; tdt
dx .
4 ¡
§
³ ¨Š1 t 4 ¸š dt
t 4ln t 4 C Â&#x; I
2 x 1 4ln
2 x 1 4 C.
CĂĄch 2: SÓą dÓŠng mĂĄy tĂnh &DVLR %˹ͣc 1: Thay x
1 WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 0,174457 . 2x 1 4
2 vĂ o hĂ m sÓ&#x2022; f x
%˹ͣc 2: Sӹ dӊng SHIFT
d , x , . dx
d 2 X 1 4ln 2 X 1 4 x 2 WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 0,174457 , bŇľng kÓ&#x192;t quҧ dx cÓŤD EŃÓ&#x;F GR Ăży FKÓ&#x2018;Q ĂżiS iQ $ NÓ&#x192;u kÓ&#x192;t quҧ khĂ´ng bŇľng kÓ&#x192;t quҧ EŃÓ&#x;c 1, ta thÓą tiÓ&#x192;S FiF ĂżiS iQ NKiF QKŃ FiFK WUrQ ChÓ&#x2018;n A. Ä&#x2C6;iS iQ $ 1KŇąp
VĂ dÓŠ 3: TĂŹm nguyĂŞn hĂ m I A. sin 3 x C.
Âł sin
2
x.cosxdx .
B. sin 2 x C.
C.
LÓĄi giҧi chi tiÓ&#x192;t CĂĄch 1: SÓą dÓŠQJ SKŃŃŤQJ SKiS ĂżÓ&#x2122;i biÓ&#x192;n Ä&#x2C6;Ňťt sin x t Â&#x; cos xdx
dt , ta cĂł I
Âł t dt 2
CĂĄch 2: SÓą dÓŠQJ YL SKkQ 2 Âł sin x.cosxdx
2 Âł sin xd sinx
ChÓ&#x2018;n C.
sin 3 x C. 3
D.
cos 2 x C. 2
t3 C . TrÓŁ lŇĽL SKpS ĂżÓ&#x2122;i biÓ&#x192;n WD ĂżŃÓ§c I 3
sin 3 x C. 3
sin 3 x C. 3
BĂ&#x20AC;I TŇ°P TÓ&#x2DC;NG HÓŚ3 &+8<Ă&#x2021;1 Ä&#x2C6;Ó&#x201E; 1
&kX 1: Trong cĂĄc hĂ m sÓ&#x2022; sau, hĂ m sÓ&#x2022; nĂ o cĂł mÓ?t nguyĂŞn hĂ m lĂ hĂ m sÓ&#x2022; F x ln x ? A. f x
x.
B. f x
1 . x
C. f x
x3 . 2
D. f x
x.
&kX 2: Cho f x , g x lĂ cĂĄc hĂ m sÓ&#x2022; [iF ĂżÓ?nh vĂ liĂŞn tÓŠc trĂŞn \ . Trong cĂĄc mÓ&#x2039;QK ĂżÓ&#x2026; sau, mÓ&#x2039;QK ĂżÓ&#x2026; nĂ o VDL?
³ f x g x dx ³ f x dx.³ g x dx . C. ³ ª f x g x Ÿº dx ³ f x dx ³ g x dx . A.
B. Âł 2 f x dx D.
2 Âł f x dx .
³ ª f x g x Ÿº dx ³ f x dx ³ g x dx . 271
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? &kX 3: NÓ&#x192;u
Âł f x dx
1 ln x C thĂŹ f x lĂ x
A. f x
x ln x C .
B. f x x
C. f x
1 ln x C . x2
D. f x
1 ln x C . x
x 1 . x2
&kX 4: HĂ m sÓ&#x2022; F x e x lĂ mÓ?t nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; 3
A. f x e .
B. f x 3 x .e .
x3
2
x3
C. f x
3
ex . 3x 2
D. f x
3
x3 .e x 1 .
&kX 5: TĂŹm nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022; f x e5 x . A.
Âł f x dx
e5 x ln 5+ C .
B.
Âł f x dx
1 5x e +C . 5
C.
Âł f x dx
5e5 x + C .
D.
Âł f x dx
e5x + C .
&kX 6: %LÓ&#x192;t F x lĂ mÓ?t nguyĂŞn hĂ m cÓŤa cÓŤa hĂ m sÓ&#x2022; f x sin x Yj ĂżÓ&#x2014; thÓ? hĂ m sÓ&#x2022; y
F x ĂżL TXD
§S ¡ ĂżLÓ&#x2021;m M 0;1 . TĂnh F ¨ ¸ . Š2š §S ¡ B. F ¨ ¸ 1 . Š2š
§S ¡ A. F ¨ ¸ 2 . Š2š &kX 7: Cho biÓ&#x192;t
2 x 13
Âł x 1 x 2 dx
A. a 2b 8 . &kX 8: HĂ m sÓ&#x2022; y
§S ¡ C. F ¨ ¸ 0 . Š2š
§S ¡ D. F ¨ ¸ 1 . Š2š
a ln x 1 b ln x 2 C . MÓ&#x2039;QK ĂżÓ&#x2026; QjR VDX Ăżk\ Ăż~QJ"
B. a b 8 .
C. 2a b 8 .
D. a b 8 .
f ( x) cĂł mÓ?t nguyĂŞn hĂ m lĂ F x e 2 x . TĂŹm nguyĂŞn hĂ m cÓŤa hĂ m sÓ&#x2022;
f ( x) 1 . ex
f ( x) 1 f ( x) 1 dx e x e x C . dx 2e x e x C . B. Âł x x e e f ( x) 1 f ( x) 1 1 x x dx e e C . dx 2e x e x C . C. Âł D. Âł x x e 2 e x 3 &kX 9: Khi tĂnh nguyĂŞn hĂ m Âł x 1 WD ĂżŃÓ§c nguyĂŞn hĂ m nĂ o? dx , bŇľQJ FiFK ÿҝt u x 1 A.
Âł
A. Âł 2u u 2 4 du .
&kX 10: HĂ m sÓ&#x2022; F x
f x
B.
Âł u
2
ax b
4 du .
C. Âł 2 u 2 4 du .
D.
Âł u
2
3 du .
4 x 1 ( a, b lĂ cĂĄc hŇľng sÓ&#x2022; thÓľc) lĂ mÓ?t nguyĂŞn hĂ m cÓŤa
12 x . TĂnh a b . 4x 1
A. 0 .
B. 1 .
C. 2 .
D. 3 .
&kX TÓ&#x2022;F ĂżÓ? WKD\ ĂżÓ&#x2122;i doanh thu (bŇľQJ Ăż{ OD WUrQ PÓ?t mĂĄy tĂnh) cho viÓ&#x2039;c bĂĄn x mĂĄy tĂnh lĂ f x , biÓ&#x192;t f c x 12 x 5 3 x 2 2 x 12 . TĂŹm tÓ&#x2122;ng doanh WKX NKL EiQ ĂżŃÓ§F PŃÓĄL KDL Pi\ WtQK ÿҍu tiĂŞn. A. Ăż{ OD
B. Ăż{ OD
C. Ăż{ OD
272
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D. Ăż{ OD
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ?
&kX MÓ?t bĂĄc thÓ§ [k\ EŃŤP QŃÓ&#x;c vĂ o bÓ&#x2021; chÓD QŃÓ&#x;c. GÓ&#x2018;i h t lĂ thÓ&#x2021; WtFK QŃÓ&#x;F EŃŤP ĂżŃÓ§c sau t giây. Cho hc t 3at 2 bt Yj EDQ ÿҍu bÓ&#x2021; NK{QJ Fy QŃÓ&#x;c. Sau 5 giây thĂŹ thÓ&#x2021; WtFK QŃÓ&#x;c trong bÓ&#x2021; lĂ 150m3 , sau 10 giây thĂŹ thÓ&#x2021; WtFK QŃÓ&#x;c trong bÓ&#x2021; lĂ 1100m3. TĂnh thÓ&#x2021; tĂch cÓŤD QŃÓ&#x;c trong bÓ&#x2021; VDX NKL EŃŤP ĂżŃÓ§c 20 giây. A. 8400m3 .
B. 2200m3 .
C. 600m3 .
D. 4200m3 .
Ä&#x2C6;Ă&#x2C6;3 Ă&#x2C6;1 &+8<Ă&#x2021;1 Ä&#x2C6;Ó&#x201E; 1 1â&#x20AC;&#x201C;B
2â&#x20AC;&#x201C;A
11 â&#x20AC;&#x201C; A
12 â&#x20AC;&#x201C; A
3â&#x20AC;&#x201C;D
+ŃÓ&#x;ng dŇŻn giҧi 2 x 13 &kX 7: Âł dx ( x 1)( x 2)
4â&#x20AC;&#x201C;B
§ 5
5â&#x20AC;&#x201C;B
6â&#x20AC;&#x201C;A
7â&#x20AC;&#x201C;D
1 1 dx 3Âł dx x 1 x 2
3 ¡
5Âł
2 4x 1
6ax a 2b . 4x 1
³ ¨Š x 1 x 2 ¸š dx
8â&#x20AC;&#x201C;B
9â&#x20AC;&#x201C;C
10 â&#x20AC;&#x201C; B
5ln x 1 3ln x 2 C .
Âa 5 VŇąy ÂŽ nĂŞn a b 8 . ÂŻb 3
ChÓ&#x2018;n D. &kX 10: Ta cĂł F c x a 4 x 1 ax b .
Ä&#x2C6;Ó&#x2021; F x lĂ mÓ?t nguyĂŞn hĂ m cÓŤa f x thĂŹ
Â6a 12 Âa 2 12 x . Â&#x153;ÂŽ Â&#x153;ÂŽ 4x 1 ÂŻa 2b 0 ÂŻb 1
6ax a 2b 4x 1
'R Ăży a b 1 . ChÓ&#x2018;n B. &kX f x
Âł 12 x
5
3 x 2 2 x 12 dx
12 6 1 3 1 2 x 3. x 2. x 12 x C 5 1 2 1 1 1
2 x 6 x3 x 2 12 x C . 9u Ăżk\ Oj ÂłWÓ&#x2022;F ĂżÓ? WKD\ ĂżÓ&#x2122;i doanh thu (bŇľQJ Ăż{ OD WUrQ PÓ?t mĂĄy tĂnh) cho viÓ&#x2039;c bĂĄn x mĂĄy tĂnhâ&#x20AC;? nĂŞn C 0. 'R YŇąy ta cŇŤn thay x 12 vĂ o sÓ ĂżŃÓ§c f 12 2.126 123 122 12.12 5973984 . ChÓ&#x2018;n A. &kX 7D Fy h t
Âł hc t dt
Âł 3at
2
bt dt
at 3 b
'R EDQ ÿҍu hÓ&#x2014; NK{QJ Fy QŃÓ&#x;c nĂŞn h 0 0 Â&#x153; C /~F JLk\ h 5 a.53 b. Suy ra a 1, b
52 2
t2 C. 2
0 Â&#x; h t at 3 b
150 /~F JLk\ h 10 a.103 b.
2 Â&#x; h t t 3 t 2 Â&#x; h 20 203 202
t2 . 2
102 2
1100 .
8400m3 .
ChÓ&#x2018;n A. 273
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ?
&+8<Ă&#x2021;1 Ä&#x2C6;Ó&#x201E; 2
TĂ?CH PHĂ&#x201A;N A. KIÓ&#x201A;N THÓŹC TRÓ?NG TĂ&#x201A;M .KiL QLÓ&#x2039;P WtFK SKkQ
f x liĂŞn tÓŠc trĂŞn K vĂ a, b Â? K . NÓ&#x192;u F x lĂ mÓ?t nguyĂŞn hĂ m cÓŤa y
Cho hĂ m sÓ&#x2022; y
K thĂŹ F b F a ĂżŃÓ§c gÓ&#x2018;i lĂ tĂch phân cÓŤa y
f x tÓŻ a ĂżÓ&#x192;n b vĂ kĂ hiÓ&#x2039;u lĂ
f x trĂŞn
b
Âł f x dx a
b
Âł f x dx
F b F a .
a
ChĂş Ă˝: 7tFK SKkQ [iF ĂżÓ?nh khĂ´ng phÓŠ thuÓ?c biÓ&#x192;n
b
Âł
b
f x dx
Âł f t dt
a
F b F a .
a
1.2. TĂnh chŇŠt cÓŤD WtFK SKkQ a
Âł
b
Âł
f ( x)dx 0
a
a
a
Âł kf ( x)dx
b
b
b
b
a
a
a
Âł > f ( x) r g ( x)@dx Âł f ( x)dx r Âł g ( x)dx Ć&#x201D; NÓ&#x192;u f x t 0 trĂŞn > a; b @ thĂŹ
b
Âł f ( x)dx
f ( x)dx
a
b
k Âł f ( x)dx a
b
c
b
a
a
c
Âł f ( x)dx Âł f ( x)dx Âł f ( x)dx
b
Âł f ( x)dx t 0 . a
b
Ć&#x201D; NÓ&#x192;u f x t g x trĂŞn > a; b @ thĂŹ
Âł a
b
f ( x)dx t Âł g ( x)dx . a
B. CĂ C DҤNG BĂ&#x20AC;I TŇ°P DŇĽQJ 7tQK WtFK SKkQ EŇľQJ SKŃŃŤQJ SKiS ĂżÓ&#x2122;L ELÓ&#x192;n sÓ&#x2022; 3KŃŃŤQJ SKiS JLҧL Ä&#x2C6;Ňťt t
t x . CĂ´ng thÓF ĂżÓ&#x2122;i biÓ&#x192;n sÓ&#x2022;
b
Âł a
f ªt x ºŸ .t c x dx
t b
Âł f t dt .
t a
2. VĂ dÓŠ mŇŻu VĂ dÓŠ 1: Cho I
3
Âłx 1
A. I
2
2dt Âł t 2 1. 2
dx 1 x
2
Ä&#x2C6;Ňťt t B. I
2
1 x 2 thĂŹ tĂch phân I trÓŁ thĂ nh
tdt Âł t 2 1. 2
C. I
2
dt Âł t 2 1. 2
LÓĄi giҧi chi tiÓ&#x192;t
274
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D. I
2
2tdt . 2 1
Âłt 2
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? CĂĄch 1: I
3
Âłx 1
Ä&#x2C6;Ňťt t
3
dx 1 x
Âłx
2
1
xdx 2
1 x2
.
1 x 2 Â&#x; t 2 1 x 2 Â&#x; 2tdt
Ä&#x2C6;Ó&#x2122;i cŇąQ x 1 Â&#x; t .KL Ăży I
2 ;x
2
2
tdt Âł t 2 1 t 2
Âłt 2
2 xdx Â&#x; tdt
3Â&#x;t
xdx;
2.
dt . 1
2
CĂĄch 2: SÓą dÓŠQJ Pi\ WtQK &DVLR 3
1
ÂłX
dX WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 0,332067 . 1 X2 %˹ͣc 2: TĂnh tĂch phân cÓŤD ĂżiS iQ ĂżiS iQ QjR ĂżŃÓ§c kÓ&#x192;t quҧ QKŃ EŃÓ&#x;c 1 thĂŹ chÓ&#x2018;n.
%˹ͣc 1: NhŇąp tĂch phân
1
Ä&#x2C6;iS iQ $ QKŇąp I
2
ÂłX 2
Ä&#x2C6;iS iQ % QKŇąp I
2
XdX WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 0,549306 , loŇĽL ĂżiS iQ % 2 1
ÂłX 2
Ä&#x2C6;iS iQ & QKŇąp I
2 dX WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 0,664134 , loŇĽL ĂżiS iQ $ 1
2
2
ÂłX
1 dX WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 0,332067 , chÓ&#x2018;Q ĂżiS iQ & 1
2
2
ChÓ&#x2018;n C. VĂ dÓŠ 2: Cho I
1
x3 Âł0 x 4 1 dx
3 . 4 LÓĄi giҧi chi tiÓ&#x192;t A. a b
CĂĄch 1: Ä&#x2C6;Ňťt u
a b.ln 2 WURQJ Ăży a, b lĂ cĂĄc sÓ&#x2022; nguyĂŞn. ChÓ&#x2018;n phĂĄt biÓ&#x2021;X Ăż~QJ.
B. a b
4
x 1 Â&#x; du
3
1 . 4
4 x dx . I
C. a b 2
du
Âł 4u 1
1 nĂŞn a b 4 CĂĄch 2: SÓą dÓŠQJ YL SKkQ 'R Ăży a 0; b
I
1
x3 Âł0 x 4 1 dx
1
d x 4 1
Âł 4 x 0
4
D. a b.
1 1 1 ln 2 ln1 ln 2. 4 4 4
1 . 4 1 1 .ln x 4 1 0 4
1
1 2 ln | u | 1 4
1 . 2
1 1 1 ln 2 ln1 ln 2 . 4 4 4
1 1 nĂŞn a b . 4 4 CĂĄch 3: SÓą dÓŠQJ Pi\ WtQK &DVLR 'R Ăży a 0; b
%˹ͣc 1: NhŇąp tĂch phân I
1
Âł 0
X3 dX ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 0,1732867951 . X 4 1
%˹ͣc 2: GĂĄn giĂĄ trÓ? kÓ&#x192;t quҧ FKR $ 6+,)7 672 $ 275
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? %˹ͣc 3: Giҧi hÓ&#x2039; SKŃŃŤQJ WUuQK KDL Ňn Âa b ln 2 ° Ä&#x2C6;iS iQ $ 1KŇąp hÓ&#x2039; SKŃŃŤQJ WUuQK ÂŽ 3 °Ě&#x201E;a b 4 Âa b ln 2 ° Ä&#x2C6;iS iQ % 1KŇąp hÓ&#x2039; SKŃŃŤQJ WUuQK ÂŽ 1 °Ě&#x201E;a b 4
Âa b ln 2 ° Ä&#x2C6;iS iQ & 1KŇąp hÓ&#x2039; SKŃŃŤQJ WUuQK ÂŽ 1 °Ě&#x201E;a b 2
A
A
A
ĂżŃÓ§c kÓ&#x192;t quҧ lĂ nghiÓ&#x2039;m vĂ´ tÓ?, loŇĽi.
Âa 0 ° ĂżŃÓ§c kÓ&#x192;t quҧ lĂ ÂŽ 1 , chÓ&#x2018;Q ĂżiS iQ % °Ě&#x201E;b 4 ĂżŃÓ§c kÓ&#x192;t quҧ lĂ nghiÓ&#x2039;m vĂ´ tÓ?, loŇĽi.
Âa b ln 2 A ĂżŃÓ§c kÓ&#x192;t quҧ lĂ nghiÓ&#x2039;m vĂ´ tÓ?, loŇĽi. Ä&#x2C6;iS iQ ' 1KŇąp hÓ&#x2039; SKŃŃŤQJ WUunh ÂŽ ÂŻa b 0 ChÓ&#x2018;n B. 3 x a VĂ dÓŠ 3: Cho Âł dx b ln 2 c ln 3 vÓ&#x;i a , b , c lĂ cĂĄc sÓ&#x2022; nguyĂŞn. 3 0 4 2 x 1
GiĂĄ trÓ? cÓŤa a b c bŇľng A. 1 . B. 2 . LÓĄi giҧi chi tiÓ&#x192;t Ä&#x2C6;Ňťt t x 1 Â&#x; t 2 x 1 Â&#x; x t 2 1 Â&#x; dx Ä&#x2C6;Ó&#x2122;i cŇąQ x 0 Â&#x; t 1 ; x 3 Â&#x; t 2 . .KL Ăży 2
t2 1 Âł1 4 2t .2tdt
2
2
t3 t Âł1 t 2 dt
6 ¡ § 2 ³1 ¨Š t 2t 3 t 2 ¸š dt
C. 7 .
D. 9 .
2tdt .
2
§ t3 2 ¡ ¨ t 3t 6ln t 2 ¸ Š3 š1
Âa 7 ° Suy ra ÂŽb 12 Â&#x; a b c 1 . °c 6 ÂŻ ChÓ&#x2018;n A.
DŇĽQJ 7tFK SKkQ WÓŻQJ SKŇŤn 3KŃŃŤQJ SKiS JLҧL b
b
b
NÓ&#x192;u u vĂ v lĂ hai hĂ m sÓ&#x2022; Fy ÿҼo hĂ m liĂŞn tÓŠc trĂŞn K Âł udv uv a Âł vdu. a
2. VĂ dÓŠ mŇŻu VĂ dÓŠ 1: Cho tĂch phân I 2
2
2
ln x dx . KhҡQJ ĂżÓ?QK QjR VDX Ăżk\ Ăż~QJ" x2 1
Âł
A. I
1 1 ln x Âł 2 dx. x x 1 1
C. I
1 2 ln x 1 Âł dx. x 1
2
a
2
2
B. I
1 1 ln x Âł 2 dx. x x 1 1
D. I
1 2 ln x 1 Âł dx. x 1
2
276
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7 12ln 2 6ln 3. 3
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? LÓĄi giҧi chi tiÓ&#x192;t 1  du dx Âu ln x ° ° ° x 'R Ăży I Ä&#x2C6;Ňťt ÂŽ Â&#x; 1 ÂŽ °¯dv x 2 dx °v 1 °Ě&#x201E; x
2
2
1 1 ln x Âł 2 dx. x x 1 1
ChÓ&#x2018;n B. 2
Âł (4 x 3).ln xdx
VĂ dÓŠ 2: TĂnh tĂch phân I
a ln 2 b . TĂnh giĂĄ trÓ? cÓŤa a 2b .
1
A. 1.
B. 1 .
C. 2.
D.
1 . 2
LÓĄi giҧi chi tiÓ&#x192;t  dx °Âu ln x °du CĂĄch 1: Ä&#x2C6;Ňťt ÂŽ . Â&#x;ÂŽ x °Ě&#x201E;dv 4 x 3 dx °v 2 x 2 3 x ÂŻ
.KL Ăży I
2
2 x 2 3x dx x 1
2 x2 3x ln x Âł 2
1
14ln 2 0 x 2 3 x
2 1
2
2.22 3.2 ln 2 2.12 3.1 ln1 Âł 2 x 3 dx 1
14ln 2 0 ª 22 3.2 12 3.1 ºŸ
14ln 2 10 4 14ln 2 6. 'R Ăży a 14; b 6 Â&#x; a 2b 14 2 6 2 . CĂĄch 2: SÓą dÓŠQJ Pi\ WtQK &DVLR %˹ͣc 1: NhŇąp tĂch phân
2
Âł 4X 3 .ln X dX ĂżŃÓ§c kÓ&#x192;t quҧ lĂ 3,704060528. 1
%˹ͣc 2: GĂĄn giĂĄ trÓ? kÓ&#x192;t quҧ FKR $ 6+,)7 672 $ %˹ͣc 3: Giҧi hÓ&#x2039; SKŃŃŤQJ WUuQK KDL Ňn Âa ln 2 b A Ä&#x2C6;iS iQ $ 1KŇąp hÓ&#x2039; SKŃŃŤQJ WUuQK ÂŽ ĂżŃÓ§c kÓ&#x192;t quҧ lĂ nghiÓ&#x2039;m vĂ´ tÓ?, loŇĽi. ÂŻa 2b 1 Âa ln 2 b A ĂżŃÓ§c kÓ&#x192;t quҧ lĂ nghiÓ&#x2039;m vĂ´ tÓ?, loŇĽi. Ä&#x2C6;iS iQ % 1KŇąp hÓ&#x2039; SKŃŃŤQJ WUuQK ÂŽ ÂŻa 2b 1 Âa ln 2 b A Âa 14 Ä&#x2C6;iS iQ & 1KŇąp hÓ&#x2039; SKŃŃŤQJ WUuQK ÂŽ ĂżŃÓ§c kÓ&#x192;t quҧ lĂ ÂŽ , chÓ&#x2018;Q ĂżiS iQ & ÂŻa 2b 2 ÂŻb 6
Âa ln 2 b A ° ĂżŃÓ§c kÓ&#x192;t quҧ lĂ nghiÓ&#x2039;m vĂ´ tÓ?, loŇĽi. Ä&#x2C6;iS iQ ' 1KŇąp hÓ&#x2039; SKŃŃŤQJ WUuQK ÂŽ 1 °Ě&#x201E;a 2b 2 ChÓ&#x2018;n C.
277
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ?
DŇĽng 3 7tFK SKkQ PÓ?t sÓ&#x2022; KjP WKŃÓĄng gŇťS S 3
Âł sin
VĂ dÓŠ 1: Cho I
b x tan xdx ln a . ChÓ&#x2018;n mÓ&#x2039;QK ĂżÓ&#x2026; Ăż~QJ 8
2
0
B. a b
A. a b 4. LÓĄi giҧi chi tiÓ&#x192;t
I
S 3
Âł sin
2
Ä&#x2C6;Ňťt u
I
1 2
Âł
1 u du
2
1
1
§ u2 ¡ §1 ¡ ln u du u ¸ ³1 ¨Š u ¸š ¨Š 2 š1
u
cos x
0
1 , x 0 Â&#x; u 1. 2 1¡ § 1 1¡ 3 § ¨ ln1 ¸ ¨ ln ¸ ln 2 . 2š Š 2 8š 8 Š
2
2
4.
2
Âł
S Â&#x;u 3
D. a b
1 cos x sin x dx .
3
sin x Âł0 cos x dx
2
sin xdx Ä&#x2C6;Ó&#x2122;i cŇąn x
cos x Â&#x; du
1
3
3
sin x Âł0 sin x. cos x dx
x tan xdx
S
S
S 3
0
C. ab 6.
2.
2, b 3 nĂŞn ab 6.
'R Ăży a ChÓ&#x2018;n C.
4
Âłx
VĂ dÓŠ 2: %LÓ&#x192;t I
3
dx x
a ln 2 b ln 3 c ln 5, vÓ&#x;i a, b, c lĂ cĂĄc sÓ&#x2022; nguyĂŞn. TĂnh S
2
B. S
A. S 6 . LÓĄi giҧi chi tiÓ&#x192;t 4
dx Âł3 x 2 x
CĂĄch 1: I
4
dx Âł3 x x 1
C. S
2. 4
x 1 x Âł3 x x 1 dx
ln 4 ln 5 ln 3 ln 4
4, b 1, c 1 Â&#x; S
6X\ UD a
I
1
Âł x a x b dx
4, b 1, c 1 , tÓŻ Ăży S
6X\ UD a
4
ªln x ln x 1 Ÿº 3
2.
a b c
1 ln x ln x 1
0 1 3
dx Âł3 x x 1
1 ¡
3
4
4
dx Âł3 x 2 x
§1
³ ¨Š x x 1 ¸š dx
0.
4ln 2 ln 3 ln 5.
CĂĄch 2: Ă p dÓŠng cĂ´ng thÓc tĂnh nhanh 4
4
D. S
2 .
a b c.
a b c
1 ln x a ln x b WD ĂżŃÓ§F a b
ln 4 ln 5 ln 3 ln 4
4ln 2 ln 3 ln 5 .
2.
CĂĄch 3: SÓą dÓŠQJ Pi\ WtQK &DVLR 4
Âłx
%˹ͣc 1: I
3
a
b
'R Ăży 2 .3 .5c
dx x
2
a ln 2 b ln 3 c ln 5 ln 2a ln 3b ln 5c
ln 2a.3b.5c .
eI .
%˹ͣc 2: TĂnh tĂch phân
4
Âłx 3
2
1 dx bŇľng mĂĄy tĂnh, gĂĄn giĂĄ trÓ? WKX ĂżŃÓ§F FKR $ 6KLIW 672 $ x
%˹ͣc 3: TĂnh e A WD ĂżŃÓ§c kÓ&#x192;t quҧ lĂ
16 15
24.3 1.5 1 GR Ăży a 4, b 1, c 1 .
ChÓ&#x2018;n B. 278
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? a
2 ? 7
VĂ dÓŠ 3: &y EDR QKLrX VÓ&#x2022; a Â? 0;20S sao cho Âł sin 5 x.sin 2 xdx 0
A. 20. LÓĄi giҧi chi tiÓ&#x192;t
B. 19.
a
Ta cĂł Âł sin 5 x sin 2 xdx 0
C. 9.
a
2 Â&#x153; 2 Âł sin 6 x cos xdx 7 0 a
sin 7 x Â&#x153; 7 0
VĂŹ a Â? 0;20S Â&#x; 0
D. 10.
a
2 Â&#x153; Âł sin 6 d sin x
7 0
1 7
1 Â&#x153; sin 7 a 1 Â&#x153; sin a 1 Â&#x153; a 7
S 2
k 2S k Â? ] .
S S 39S 1 39 k 2S 20S Â&#x153; k 2S Â&#x153; k , 2 2 2 4 4
k Â? ] Â&#x; k Â? ^0;1;2;3;4;5;6;7;8;9`. VŇą\ Fy VÓ&#x2022; a WKÓ&#x201C;D PmQ ĂżÓ&#x2026; EjL ChÓ&#x2018;n D.
DŇĽng 4 7tFK SKkQ KjP Ňn 3KŃŃŤQJ SKiS JLҧL b
b
7tFK SKkQ [iF ĂżÓ?nh khĂ´ng phÓŠ thuÓ?c biÓ&#x192;n Âł f x dx
f t dt
Âł
a
a
b
Âł f u du . a
2. VĂ dÓŠ mŇŻu VĂ dÓŠ 1: Cho
4
Âł
f x dx 18,
2
8
Âł
f x dx 15 %LÓ&#x2021;u thÓc
2
A. 3.
8
Âł f x dx
bŇľng
4
B. 33.
C. 3 .
D. 33 .
LÓĄi giҧi chi tiÓ&#x192;t Ta cĂł
8
Âł
f x dx
2
4
Âł 2
8
8
4
4
f x dx Âł f x dx Â&#x; Âł f x dx
8
4
f x dx Âł f x dx 15 18 3 .
Âł 2
2
ChÓ&#x2018;n C. VĂ dÓŠ 2: Cho
2
Âł x 2 f c x dx
5 vĂ f 0 1. TĂnh I
0
A. I
3.
B. I
2
Âł f x dx . 0
C. I
3.
D. I
7.
7.
LÓĄi giҧi chi tiÓ&#x192;t Âu x 2 Âdu dx .KL Ăży Ä&#x2C6;Ňťt ÂŽ Â&#x;ÂŽ ÂŻdv f c( x)dx ÂŻv f ( x)
5
2
Âł x 2 f c x dx 0
2
( x 2) f ( x) 0 Âł f x dx 2
2 f (0) I
2 I Â&#x; I
3.
0
ChÓ&#x2018;n B.
279
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? VĂ dÓŠ 3: Cho
2
Âł
f x 2 1 xdx
5
Âł f x dx bŇľng
2 .KL Ăży I
1
2
A. 2 . LÓĄi giҧi chi tiÓ&#x192;t
B. 1 .
C. 1 .
x 2 1 Â&#x; dt 2 xdx . Ä&#x2C6;Ó&#x2122;i cŇąQ x 1 Â&#x; t 2 , x 2 Â&#x; t
D. 4 .
Ä&#x2C6;Ňťt t
2
5.
5
5
2
1 f t dt Â&#x; Âł f t dt 2 Âł2 2
.KL Ăży Âł f x 2 1 xdx 1
MĂ tĂch phân khĂ´ng phÓŠ thuÓ?c vĂ o biÓ&#x192;Q QrQ I
2 Âł f x 2 1 xdx
4.
1
5
Âł
5
f x dx
Âł f t dt
2
4.
2
ChÓ&#x2018;n D. VĂ dÓŠ 4: Cho hĂ m sÓ&#x2022; f c x thÓ&#x201C;a mĂŁn f 2
f 1 bŇľng 41 . 100 LÓĄi giҧi chi tiÓ&#x192;t
B.
A.
1 . 10
ª f x ºŸ
ÂŹ
2 vĂ o hai vÓ&#x192; WD Fy
1 f x
Âź
2
dx
D.
1
Âł 4 x dx Â&#x153; f ( x)
1 16 C Â&#x153; C 1 25
x 4 9 GR Ăży
391 . 400
1 . 40
4 x3 .
2
f c x
Âł ÂŞ f x Âş
/ŇŠy nguyĂŞn hĂ m hai vÓ&#x192; ta cĂł
VŇąy
C.
f c x
2
Ta cĂł f c x 4 x 3 . ÂŞÂŹ f x ºŸ Â&#x153;
Thay x
1 2 vĂ f c x 4 x 3 . ÂŞÂŹ f x ºŸ vÓ&#x;i mÓ&#x2018;i x Â? \ . GiĂĄ trÓ? cÓŤa 25
3
x4 C .
9.
1 1 1 9 10 Â&#x153; f 1 . f 1
10
ChÓ&#x2018;n B.
VĂ dÓŠ 5: Cho hĂ m sÓ&#x2022; f x Fy ÿҼR KjP GŃŃŤQJ OLrQ WÓŠF WUrQ ĂżRŇĽn > 0;1@ thÓ&#x201C;a mĂŁn f 0 1 vĂ 1
1
2 1º ª 3³  f c x ª f x ºŸ  dx d 2 ³ 9Ÿ 0 0
3 . 2 LÓĄi giҧi chi tiÓ&#x192;t A.
1
B.
f c x f x dx . TĂnh tĂch phân
1
³ ª f x ºŸ
3
dx .
0
5 . 4
C.
5 . 6
D. 1
7 . 6
2 2 7D Fy Âł ÂŤÂŞ 3 f c x f x 2.3 f c x f x 1º dx d 0 Â&#x153; Âł ÂŞ3 f c x f x 1Âş dx d 0 . ÂŹ Âź Âź 0ÂŹ 0
Suy ra 3 f c x f x 1 0 Â&#x153;
f c x f x
1 Â&#x153; f c x . f 2 x
3
1 . 9
280
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? VĂŹ ÂŞÂŹ f 3 x ºŸc
3. f 2 x f c x nên suy ra ª f 3 x ºŸc
1 Â&#x; f 3 x
3
1 x C. 3
VĂŹ f 0 1 nĂŞn f 3 0 1 Â&#x; C 1 .
1 x 1. 3
VŇąy f 3 x
Suy ra
1
3
³ ª f x ºŸ dx 0
1
§1
¡
³ ¨Š 3 x 1¸š dx 0
7 . 6
ChÓ&#x2018;n D. VĂ dÓŠ 6: Cho hĂ m sÓ&#x2022; f x thÓ&#x201C;a mĂŁn ÂŞÂŹ f c x ºŸ f x . f cc x 15 x 4 12 x , x Â? \ 2
vĂ f 0
f c 0 1 . GiĂĄ trÓ? cÓŤa f 2 1 bŇľng
9 . 2 LÓĄi giҧi chi tiÓ&#x192;t
B.
A.
5 . 2
C. 10 .
D. 8 .
7D Fy f c x f x . f cc x 15 x 4 12 x , x Â? \ . 2
Â&#x153; ÂŞÂŹ f c x . f x ټc 15 x 4 12 x , x Â? \ Â&#x153; f c x . f x 3 x5 6 x 2 C1 . 'R f 0
f c 0 1 nĂŞn ta cĂł C1 1.
§1 ¡c TÓŻ Ăży f c x . f x 3 x 5 6 x 2 1 Â&#x153; ¨ f 2 x ¸ Š2 š MĂ f 0 1 nĂŞn ta cĂł C2 1. 'R Ăży f 2 x
3x5 6 x 2 1 Â&#x153; f 2 x
x 6 4 x 3 2 x C2 .
x6 4 x3 2 x 1 .
VŇąy f 2 1 8.
ChÓ&#x2018;n D. DŇĽng 5: ÓŹng dÓŠQJ WtFK SKkQ WURQJ QKÓłQJ EjL WRiQ WKÓľc tÓ&#x192; 3KŃŃŤQJ SKiS JLҧL GÓ&#x2018;i v t , s t , a t lŇŤQ OŃÓ§t lĂ vŇąn tÓ&#x2022;F TXmQJ ĂżŃÓĄng, gia tÓ&#x2022;c cÓŤa vŇąt, ta cĂł mÓ&#x203A;i liĂŞn hÓ&#x2039; giÓłD FK~QJ QKŃ VDX Âł v t dt
s t
Âł a t dt
v t
b
4XmQJ ĂżŃÓĄng vŇąW ĂżL ĂżŃÓ§c trong khoҧng thÓĄi gian t Â? > a; b @ lĂ Âł v t dt
s b s a .
a
2. VĂ dÓŠ mŇŻu VĂ dÓŠ 1: MÓ?t chŇŠW ĂżLÓ&#x2021;P ĂżDQJ FKX\Ó&#x2021;Q ĂżÓ?ng vÓ&#x;i vŇąn tÓ&#x2022;c v0 15 m/s WKu WÄ&#x192;QJ WÓ&#x2022;c vÓ&#x;i gia tÓ&#x2022;c
a t t 2 4t m/s 2 . 7tQK TXmQJ ĂżŃÓĄng chŇŠW ĂżLÓ&#x2021;P Ăży ĂżL ĂżŃÓ§c trong khoҧng thÓĄi gian 3 giây kÓ&#x2021; tÓŻ O~F
bŇłW ÿҍX WÄ&#x192;QJ tÓ&#x2022;c. A. 70, 25 m .
B. 68, 25 m .
C. 67, 25 m .
D. 69,75 m . 281
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? LÓĄi giҧi chi tiÓ&#x192;t
a t t 2 4t Â&#x; v t
MĂ v 0 C 15 Â&#x; v t
C Â? \ .
t3 2t 2 15 . 3
3
§ t3 ¡ 2 ³0 ¨Š 3 2t 15 ¸š dt
VŇąy S
t3 2t 2 C 3
Âł a t dt
69,75 m .
ChÓ&#x2018;n D. VĂ dÓŠ 2: MÓ?t Ă´ tĂ´ chuyÓ&#x2021;Q ĂżÓ?ng nhanh dŇŤQ ĂżÓ&#x2026;u vÓ&#x;i vŇąn tÓ&#x2022;c v t 7t m/s Ä&#x2C6;L ĂżŃÓ§c 5 s QJŃÓĄi lĂĄi xe phĂĄt hiÓ&#x2039;Q FKŃÓ&#x;ng ngŇĽi vŇąt vĂ phanh gŇŠp, Ă´ tĂ´ tiÓ&#x192;p tÓŠc chuyÓ&#x2021;Q ĂżÓ?ng chŇąm dŇŤQ ĂżÓ&#x2026;u vÓ&#x;i gia tÓ&#x2022;c a
35 m / s 2 . 7tQK TXmQJ ĂżŃÓĄng cÓŤD { W{ ĂżL ĂżŃÓ§c tÓŻ O~F EŇłW ÿҍu chuyÓ&#x2021;Q EiQK FKR ĂżÓ&#x192;n khi dÓŻng hҡn.
B. 96.5 m.
A. 87.5 m. LÓĄi giҧi chi tiÓ&#x192;t
C. 102.5 m. 5
4XmQJ ĂżŃÓĄQJ { W{ ĂżL ĂżŃÓ§c trong 5 s ÿҍu lĂ s1
Âł 7tdt 0
t2 7 2
D. 105 m.
5
87,5 m. 0
3KŃŃŤQJ WUuQK YŇąn tÓ&#x2022;c cÓŤa { W{ NKL QJŃÓĄi lĂĄi xe phĂĄt hiÓ&#x2039;Q FKŃÓ&#x;ng ngŇĽi vŇąt lĂ v 2 t 35 35t (m/s). Khi xe dÓŻng lŇĽi hҡn thĂŹ v 2 t 0 Â&#x153; 35 35t
0 Â&#x153; t 1.
4XmQJ ĂżŃÓĄQJ { W{ ĂżL ĂżŃÓ§c tÓŻ khi phanh gŇŠS ĂżÓ&#x192;n khi dÓŻng lŇĽi hҡn lĂ 1
1
Âł 35 35t dt
s2
0
§ t2 ¡ 35 t 35 ¨ ¸ 17.5 (m). 2 š0 Š
VŇą\ TXmQJ ĂżŃÓĄng cÓŤD { W{ ĂżL ĂżŃÓ§c tÓŻ O~F EŇłW ÿҍu chuyÓ&#x2021;Q EiQK FKR ĂżÓ&#x192;n khi dÓŻng hҡn lĂ
s
s1 s2
87.5 17.5
105 (m).
ChÓ&#x2018;n D.
BĂ&#x20AC;I TŇ°P TÓ&#x2DC;NG HÓŚ3 &+8<Ă&#x2021;1 Ä&#x2C6;Ó&#x201E; 2 &kX Cho I
2
Âł
f x dx 3 .KL Ăży J
0
A. 2 .
2
³ ª 4 f x 3ºŸ dx bҾng 0
B. 6 .
&kX .KL ĂżÓ&#x2122;i biÓ&#x192;n x
C. 8 .
3 tan t , tĂch phân I
1
Âłx 0
A. I
S 3
Âł
3dt .
0
B. I
S 6
Âł 0
D. 4 .
dx trÓŁ thĂ nh tĂch phân nĂ o? 3
2
S
S
3 dt 3
C. I
6
Âł
3tdt .
0
D. I
6
1
Âł t dt . 0
&kX %ŇĽn Minh ngÓ&#x2014;L WUrQ Pi\ ED\ ĂżL GX OÓ?ch thÓ&#x192; giÓ&#x;i vĂ vŇąn tÓ&#x2022;c chuyÓ&#x2021;Q ĂżÓ?ng cÓŤa mĂĄy bay lĂ v t 3t 2 5 (m/s) 7tQK TXmQJ ĂżŃÓĄQJ Pi\ ED\ ĂżL ĂżŃÓ§c tÓŻ giây thÓ 4 ĂżÓ&#x192;n giây thÓ 10 . A. 246 m .
B. 252 m .
C. 1134 m .
282
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D. 966 m .
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? 2
b b a ln 2 (vÓ&#x;i a lĂ sÓ&#x2022; thÓľc, b , c lĂ cĂĄc sÓ&#x2022; QJX\rQ GŃŃŤQJ Yj lĂ phân sÓ&#x2022; tÓ&#x2022;i c c
ln x dx x2 1
Âł
&kX %LÓ&#x192;t
giҧn). TĂnh giĂĄ trÓ? cÓŤa 2a 3b c . B. 6 . C. 6 . D. 5 . &kX MÓ?W { W{ ĂżDQJ FKŇĽy vÓ&#x;i tÓ&#x2022;F ĂżÓ? 10m/s WKu QJŃÓĄL OiL ÿҼp phanh, tÓŻ thÓĄL ĂżLÓ&#x2021;P Ăży { W{ FKX\Ó&#x2021;Q ĂżÓ?ng A. 4 .
chŇąm dŇŤQ ĂżÓ&#x2026;u vÓ&#x;i v(t ) 5t 10 m/s WURQJ Ăży t lĂ khoҧng thÓĄi gian tĂnh bŇľng giây, kÓ&#x2021; tÓŻ O~F EŇłW ÿҍu ÿҼp phanh. HÓ&#x201C;i tÓŻ O~F ÿҼS SKDQK ĂżÓ&#x192;n khi dÓŻng hҡn, Ă´ tĂ´ còn di chuyÓ&#x2021;n bao nhiĂŞu mĂŠt? A. 8m. B. 10m. C. 5m. D. 20m. &kX VÓ&#x;L FiFK ĂżÓ&#x2122;i biÓ&#x192;n u
e
Âłx
1 3ln x thĂŹ tĂch phân
1
A.
2 u 2 1 du. Âł 1 3 2
&kX Cho
1
2 u 2 1 du. Âł 1 9
§ 1
2
2
B.
1 ¡
³ ¨Š x 1 x 2 ¸š dx 0
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GOODA.VN - THU VIáť&#x2020;N SĂ CH QUĂ? 2
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G O O D A . V N - T Háť&#x2020;N U VSĂ C I H QU Ă?
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x 1
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285
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GOODA.VN - THU VIỆN SÁCH QUÝ
&+Ӫ Ĉӄ
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GOODA.VN - THU VIỆN SÁCH QUÝ
B. CÁC DҤNG BÀI TҰP DҥQJ ;iF ÿӏnh ҧnh cӫa mӝt hình qua phép tӏnh tiӃn. 3KѭѫQJ SKiS JLҧi ' QJ ÿӏQK QJKƭD KRһF ELӇX WKӭF WӑD ÿӝ cӫD SKpS WӏQK WLӃn. 2. Ví dө mүu Ví dө 1: Tìm mӋQK ÿӅ sai WURQJ FiF PӋQK ÿӅ VDX A. 3KpS WӏQK WLӃQ EҧR WRjQ NKRҧng cách giӳD KDL ÿLӇP EҩW Nu B. 3KpS WӏQK WLӃQ ELӃQ ED ÿLӇP WKҷQJ KjQJ WKjQK ED ÿLӇP WKҷng hàng. C. 3KpS WӏQK WLӃQ ELӃQ WDP JLiF WKjQK WDP JLiF EҵQJ WDP JLiF ÿm FKR D. 3KpS WӏQK WLӃQ ELӃQ ÿѭӡng WKҷQJ WKjQK ÿѭӡQJ WKҷQJ VRQJ VRQJ YӟL ÿѭӡQJ WKҷQJ ÿm FKR Lӡi giҧi chi tiӃt 7KHR WtQK FKҩW SKpS WӏQK WLӃQ ELӃQ ÿѭӡQJ WKҷQJ WKjQK ÿѭӡQJ WKҷQJ VRQJ VRQJ KRһF WU QJ YӟL Qy Chӑn D. G Ví dө 2: 7URQJ PһW SKҷQJ YӟL KӋ WӑD ÿӝ Oxy FKR YHFWѫ v 2; 1 Yj ÿLӇP M 3; 2 . 7uP WӑD ÿӝ G ҧQK M c FӫD ÿLӇP M TXD SKpS WӏQK WLӃQ WKHR YHFWѫ v. A. M c 5; 3 .
B. M c 1; 1 .
C. M c 1;1 .
D. M c 1;1 .
Lӡi giҧi chi tiӃt
JJJJJG G xc x 2 3 2 1 TvG M M c MM c v ® . Vұ\ M c 1;1 . ¯ yc y 1 2 1 1 Chӑn C. Ví dө 3: 7URQJ PһW SKҷng vӟi hӋ WӑD ÿӝ Oxy FKR WDP JLiF ABC Fy A 2; 4 B 5;1 C 1; 2 . 3KpS WӏQK WLӃn TJJJG ELӃQ WDP JLiF ABC WKjQK WDP JLiF AcBcC c 7uP WӑD ÿӝ WUӑQJ WkP FӫD WDP JLiF BC
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C. 4; 2 .
D. 4; 2 .
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.
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D. 'c x y .
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GOODA.VN - THU VIỆN SÁCH QUÝ Lӡi giҧi chi tiӃt Gӑi M x; y Oj ÿLӇP WKXӝc ' .
xc x 1 x ® M c xc; y c TJJvG M ® ¯ yc y 1 ¯ y
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.
Chӑn B.
DҥQJ ;iF ÿӏnh phép tӏnh tiӃn khi biӃt ҧnh và tҥo ҧnh 3KѭѫQJ SKiS JLҧi
G ;iF ÿӏQK SKpS WӏQK WLӃQ WӭF Oj WuP WӑD ÿӝ cӫD v . G G ĈӇ WuP WӑD ÿӝ cӫD v WD Fy WKӇ giҧ sӱ v a; b Vӱ dөng các dӳ NLӋQ WURQJ JLҧ WKLӃW FӫD EjL WRiQ ÿӇ
WKLӃW OұS KӋ SKѭѫQJ WUuQK KDL ҭn a b và giҧi hӋ WuP a b . 2. Ví dө mүu Ví dө 1: 7URQJ PһW SKҷng vӟi hӋ WӑD ÿӝ Oxy FKR KDL ÿѭӡQJ WKҷng
d2 x y A. Vô sӕ.
d1 x y
và
&y EDR QKLrX SKpS WӏQK WLӃQ ELӃn d1 WKjQK d 2 ? B. 4 .
C. 1 .
D. .
Lӡi giҧi chi tiӃt
G 3KpS WӏQK WLӃQ WKHR YHFWѫ v ELӃQ ÿѭӡQJ WKҷQJ WKjQK ÿѭӡQJ WKҷQJ VRQJ VRQJ KRһF WU QJ YӟL Qy
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Chӑn D. Ví dө 2: 7URQJ PһW SKҷQJ WӑD ÿӝ Oxy FKR ÿѭӡQJ WKҷng d Fy SKѭѫQJ WUuQK x y ± Yj YHFWѫ G G v 2; m ĈӇ SKpS WӏQK WLӃQ WKHR v ELӃQ ÿѭӡQJ WKҷng d WKjQK FKtQK Qy WD SKҧi chӑn m Eҵng A. 2 .
B. –1 .
C. 1 .
D. 3 .
Lӡi giҧi chi tiӃt
xc x a xc x 2 KD\ ® . BiӇX WKӭF WӑD ÿӝ cӫD SKpS WӏQK WLӃn ® ¯ yc y b ¯ yc y m 'R x y ± QrQ xc y c m xc y c m . 7KHR JLҧ WKLӃW WD Fy 2m 3 1 m 1 . &KӑQ % Ví dө 3: 7URQJ PһW SKҷQJ WӑD ÿӝ Oxy FKR ÿѭӡQJ WKҷng d x y 7uP SKpS WӏQK WLӃQ WKHR G vecWѫ v Fy JLi VRQJ VRQJ Yӟi Oy ELӃn d WKjQK d ' ÿL TXD ÿLӇm A 1;1 . G G G G A. v . B. v 1; 5 . C. v 2; 3 . D. v . 361
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GOODA.VN - THU VIỆN SÁCH QUÝ Lӡi giҧi chi tiӃt G G v Fy JLi VRQJ VRQJ Yӟi Oy QrQ v Lҩ\ M x y d x y
k k z . .
x ' x Gӑi M ' x '; y ' TvG M ® WKD\ YjR WD ÿѭӧc x y k . ¯y' y k +D\ TvG d d x y k mà d ' ÿL TXD A 1;1 k G Vұ\ v .
5 .
Chӑn D. Ví dө 4: 7URQJ PһW SKҷQJ WӑD ÿӝ Oxy FKR KDL ÿѭӡQJ WUzQ C x m y và G C c x 2 y 2 m y x m2 9HFWѫ v QjR GѭӟL ÿk\ Oj YHFWѫ FӫD SKpS WӏQK WLӃQ ELӃn
C
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2
2
G D. v
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GOODA.VN - THU VIỆN SÁCH QUÝ G Câu 5: &KR v
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B. M 3;5 .
G Câu 6: 7URQJ PһW SKҷQJ WӑD ÿӝ Oxy FKR v G SKpS WӏQK WLӃQ WKHR YHFWѫ v .
C. M 3; 7 .
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A. A' 1; 2 , B 2; 6 .
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C. A' 1; 2 , B 2; 6 .
D. A' 1;1 , B 2; 6 .
TXD
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D. PQ
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Câu 8: &KR WDP JLiF ABC và I , J lҫQ OѭӧW Oj WUXQJ ÿLӇm cӫD AB, AC 3KpS ELӃn hình T ELӃQ ÿLӇm JJJJJG JJG M WKjQK ÿLӇm M ' VDR FKR MM ' 2 IJ . MӋQK ÿӅ QjR VDX ÿk\ ÿ~QJ" JJG JJG B. T Oj SKpS WӏQK WLӃQ WKHR YHFWѫ IJ . A. T Oj SKpS WӏQK WLӃQ WKHR YHFWѫ IJ . JJJG JJJG C. T Oj SKpS WӏQK WLӃQ WKHR YHFWѫ CB . D. T Oj SKpS WӏQK WLӃQ WKHR YHFWѫ BC . JG Câu 9: 7URQJ PһW SKҷng Oxy FKR YHFWѫ v 3;2 Yj ÿѭӡQJ WKҷng ' : x y . ViӃW SKѭѫQJ JG WUuQK ÿѭӡQJ WKҷng 'c là ҧnh cӫD ÿѭӡQJ WKҷng ' TXD SKpS WӏQK WLӃQ WKHR YHFWѫ v . A. 'c : x y .
B. 'c : x y .
C. 'c : x y .
D. 'c [ \
Câu 10: 7URQJ PһW SKҷQJ WӑD ÿӝ Oxy YLӃW SKѭѫQJ WUuQK ÿѭӡQJ WUzQ C ' là ҧnh cӫD ÿѭӡQJ WUzQ G C x 2 y 2 x y TXD SKpS WӏQK WLӃQ WKHR YHFWR v 1;3 . A. & [ \
2
2
C. & [ \
2
2
.
B. & [ \
D. & [ \
2
2
2
2
ĈiS iQ FKX\rQ ÿӅ 1 1–B
2–B
3–D
4–A
5–D
6–A
7–B
8–D
9–D
10 – B
Câu 4: ĈѭӡQJ WUzQ C1 Fy WkP I1 1; 2 ĈѭӡQJ WUzQ C2 Fy WkP I 2 3; 4 . JJJG G G Vì TuG ª¬ C1 ¼º C2 TuG I1 I 2 I1 I 2 u u 4; 6 . Chӑn A.
JJJG Câu 7: 7KHR TX\ WҳF WD Fy P 1;1 , Q 1; 3 PQ
2; 2 PQ
2 2.
Chӑn B.
363
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GOODA.VN - THU VIแป N Sร CH QUร Cรขu 8:
A
JJG JJJJJG JJG ฤ าทQJ WKำญc MM ' 2 IJ chำญQJ Wำ T Oj SKpS Wำ QK WLำ Q WKHR YHFWัซ 2 ,- 7KHR JLาง WKLำ W WD Fy IJ Oj รฟัญำกQJ WUXQJ EuQK FำซD WDP JLiF ABC QrQ JJG JJJG VX\ UD 2IJ BC .
Chำ n D.
J
I
C
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Cรขu 9: 7D Fy 'c//' ย 'c : x y m m z 6 . Lาฉ\ M ; ย ' JLาง sำฑ M c TvG M ย M c ; ย M c 3; 4 . 'R M c ย 'c ย m ย m 15 WKำ D PmQ m z 6 ย 'c : x y . Chำ n D. Cรขu 10: ฤ ัญำกQJ WUzQ C Fy WkP I 2;1 EiQ NtQK R 7D Fy TvG I
22 12 1 2.
I ' 3;4 Oj WkP FำซD รฟัญำกQJ WUzQ C ' .
ฤ ัญำกQJ WUzQ C ' Fy WkP I ' 3;4 Yj EiQ NtQK R ' R
2 Fy SKัญัซQJ WUuQK x 3 y 4
Chำ n B.
364
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2
2
4.
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GOODA.VN - THU VIỆN SÁCH QUÝ
&+8<Ç1 Ĉӄ
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GOODA.VN - THU VIỆN SÁCH QUÝ
B. CÁC DҤNG BÀI TҰP Dҥng 1: Tìm ҧnh cӫD KuQK TXD SKpS ÿӕi xӭng trөc. 3KѭѫQJ SKiS JLҧi Dùng ÿӏQK QJKƭD KRһF ELӇX WKӭF WӑD ÿӝ cӫD SKpS ÿӕi xӭQJ WUөc. 2. Ví dө mүu Ví dө 1: &KR WDP JLiF ABC ÿӅX +ӓL KuQK WDP JLiF ABC Fy EDR QKLrX WUөF ÿӕi xӭng A. .K{QJ Fy WUөF ÿӕi xӭng. B. &y WUөF ÿӕi xӭng. C. &y WUөF ÿӕi xӭng. D. &y WUөF ÿӕi xӭng. Lӡi giҧi chi tiӃt WUөF ÿӕi xӭng cӫD WDP JLiF ÿӅX Oj ÿѭӡQJ WUXQJ WUӵc cӫD Fҥnh.
Chӑn D. Ví dө 2: 7URQJ PһW SKҷng Oxy FKR ÿLӇm M 2; 3 . HӓL WURQJ EӕQ ÿLӇP VDX ÿLӇP QjR Oj ҧnh cӫD M TXD SKpS ÿӕi xӭQJ WUөc Ox ? A. 3; 2 .
B. 2; 3 .
C. 3; 2 .
D. 2; 3 .
Lӡi giҧi chi tiӃt
xc x xc 2 Gӑi M c xc; y c là ҧnh cӫD ÿLӇm M x; y TXD SKpS ÿӕi xӭQJ WUөc Ox WD Fy ® ® ¯ y c y ¯ y c 3 Vұ\ M c 2; 3 . Chӑn B. Ví dө 3: ;iF ÿӏnh ҧnh cӫD ÿѭӡQJ WUzQ C : x 1 y 2
2
A. x 1 y 2
2
2
C. x 1 y 2
2
2
1 B. x 1 y 2
2
2
4 D. x 1 y 2
2
2
2
1 TXD SKpS ÿӕi xӭQJ WUөc Oy .
1
1
Lӡi giҧi chi tiӃt 7D Fy I 1; 2 Oj WkP ÿѭӡQJ WUzQ C . x Gӑi I ' là ҧnh cӫD I TXD SKpS ÿӕi xӭQJ WUөc Oy QrQ WD Fy ® I ' ¯ yI '
1
xI yI
2
I ' Oj WkP ÿѭӡQJ WUzQ C' là ҧnh cӫD C TXD SKpS ÿӕi xӭQJ WUөc Oy .
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I ' 1; 2 .
G O O D A . V N - T H UỆN V I SÁC H Q UÝ
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'R SKpS ÿӕi xӭQJ WUөF ELӃQ ÿѭӡQJ WUzQ WKjQK ÿѭӡQJ WUzQ Fy F QJ EiQ NtQK QrQ WD Fy SKѭѫQJ WUuQK ÿѭӡQJ WUzQ C' x 1 y 2
2
2
1.
Chӑn D. Ví dө 4: 7URQJ PһW SKҷng Oxy FKR ÿLӇm M 2; 3 . HӓL WURQJ EӕQ ÿLӇP VDX ÿLӇP QjR Oj ҧnh cӫD M
?
TXD SKpS ÿӕi xӭQJ TXD ÿѭӡQJ WKҷng ' : x – y A. 3; 2 .
B. 2; 3 .
C. 3; 2 .
D. 2; 3 .
Lӡi giҧi chi tiӃt Gӑi M c xc; y c là ҧnh cӫD ÿLӇm M x; y TXD SKpS ÿӕi xӭQJ TXD ' : x – y Gӑi d Oj ÿѭӡQJ WKҷQJ ÿL TXD ÿLӇm M 2; 3 Yj YX{QJ JyF ' : x – y
d : x y . Gӑi I
.
WD Fy
§5 5· d ' WKu I ¨ ; ¸ . ©2 2¹
.KL ÿy I là WUXQJ ÿLӇm cӫD MM c QrQ VX\ UD M c 3; 2 . Chӑn A. Ví dө 5: &KR ÿѭӡQJ WKҷng d Fy SKѭѫQJ WUuQK x y Yj ÿѭӡQJ WKҷng ' Fy SKѭѫQJ WUuQK
x y 3KѭѫQJ WUuQK ÿѭӡQJ WKҷng d c là ҧnh cӫD ÿѭӡQJ WKҷng d TXD SKpS ÿӕi xӭQJ WUөc
'
là
A. x .
B. x y .
C. [ \
D. \
Lӡi giҧi chi tiӃt
d ' M 1; 3 . Lҩ\ N 2; 1 d . Gӑi d1 Oj ÿѭӡQJ WKҷQJ TXD N Yj YX{QJ JyF Yӟi ' WD Fy d1 : x y . Gӑi I d1 ' I 3; 1 . Gӑi N c là ҧnh cӫD N TXD SKpS ÿӕi xӭQJ WUөc ' QrQ I Oj WUXQJ ÿLӇm cӫD NN c QrQ N c 4; 3 . d c là ҧnh cӫD ÿѭӡQJ WKҷng d TXD SKpS ÿӕi xӭQJ WUөc ' . 'R ÿy d c Oj ÿѭӡQJ WKҷQJ TXD M 1; 3 và N c 4; 3 . Vұ\ d c : y . Gӑi M
Chӑn D.
Dҥng 2: Tìm ҧnh cӫD KuQK TXD SKpS ÿӕi xӭng tâm. 3KѭѫQJ SKiS JLҧi ' QJ ÿӏQK QJKƭD KRһF ELӇX WKӭF WӑD ÿӝ cӫD SKpS ÿӕi xӭQJ WkP 2. Ví dө mүu Ví dө 1: Hình gӗP KDL ÿѭӡQJ WUzQ SKkQ ELӋW Fy F QJ EiQ NtQK Fy EDR QKLrX WkP ÿӕi xӭng? A. .K{QJ Fy B. MӝW C. +DL D. Vô sӕ. 367
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Lӡi giҧi chi tiӃt &y PӝW WkP ÿӕi xӭQJ Oj WUXQJ ÿLӇm I cӫD ÿRҥQ WKҷng nӕL KDL WkP
Chӑn B. Ví dө 2: 7URQJ PһW SKҷng Oxy ҧnh cӫD ÿLӇm A 5;3 TXD SKpS ÿӕi xӭQJ WkP I 4;1 là A. Ac 5;3 .
B. Ac –5; – 3 .
§ · D. Ac ¨ ;2 ¸ . ©2 ¹
C. Ac 3; – 1 .
Lӡi giҧi chi tiӃt
[c 2 4 5 3 7KD\ ELӇX WKӭF WӑD ÿӝ cӫD SKpS ÿӕi xӭQJ WkP I 4;1 WD ÿѭӧF ® . ¯ \ c 2 1 3 1 Vұ\ A ' 3; 1 . Chӑn C. Ví dө 3: &KR ÿLӇm I 1;1 Yj ÿѭӡQJ WKҷng d : x y . Tìm ҧnh cӫD d TXD SKpS ÿӕi xӭQJ WkP , A. d ' : x y .
B. d ' : x y .
C. d ' : x y . D. d ' : x y .
Lӡi giҧi chi tiӃt Cách 1. Lҩ\ ÿLӇm M x y d x y * .
x' Gӑi M ' x' ; y' ÐI M WKu ® ¯ y'
2 x x 2 x' ® . 2 y ¯ y 2 y'
7KD\ YjR * WD ÿѭӧc x' y' x' y' . Vұ\ ҧnh cӫD d Oj ÿѭӡQJ WKҷng d ' : x y . Cách 2. Gӑi d ' là ҧnh cӫD d TXD SKpS ÿӕi xӭQJ WkP I WKu d ' VRQJ VRQJ KRһF WU QJ Yӟi d QrQ SKѭѫQJ WUuQK d ' Fy Gҥng x y c . Lҩ\ N d Jӑi N ' ÐI N WKu N ' 5;2 . LҥL Fy 1 G F F Vұ\ d ' : x y .
.
Chӑn D. Ví dө 4: 7URQJ PһW SKҷng Oxy WuP SKѭѫQJ WUuQK ÿѭӡQJ WUzQ C c là ҧnh cӫD ÿѭӡQJ WUzQ C
x 2 y 2 1 TXD SKpS ÿӕi xӭQJ WkP I . A. [ 2 \ 2
2
1
B. [ 2 \ 2 2
1
C. [ 2 \ 2 2
1
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D. [ 2 \ 2
2
1
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GOODA.VN - THU VIỆN SÁCH QUÝ Lӡi giҧi chi tiӃt ĈѭӡQJ WUzQ C Fy WkP O EiQ NtQK R 1 . Gӑi Oc là ҧnh cӫD O TXD SKpS ÿӕi xӭQJ WkP I . xO xOc ° ° 2 7D Fy ® y ° O yOc °̄ 2
xI
x c ® O ¯ yOc yI
2 xI xO [ c ® O 2 yI yO ¯ \Oc
Oc .
ĈѭӡQJ WUzQ C c là ҧnh cӫD ÿѭӡQJ WUzQ C TXD SKpS ÿӕi xӭQJ WkP I QrQ C c Fy WkP
Oc , EiQ NtQK Rc R 1 . 3KѭѫQJ WUuQK ÿѭӡQJ WUzQ C c Oj x 2 y 2 2
1.
Chӑn C.
369
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