EJERCICIO 37 1.
8. −
3 2 7 2 3 m n ⋅− am 7 14 3 7 2 5 21 2 5 3 2 5 a m n= a m n= amn = − ⋅− 7 14 98 14
9.
2 2 3 3 2 4 6 2 6 4 2 x y ⋅− a x y = − a x y = − a2x 6y 4 3 5 15 5
10. −
2. −
3.
4. −
6. −
5 m n 3 a b ⋅− ab 2c 6 10 1 1 1 = − ⋅ am + 1 bn + 2 c = − am + 1bn + 2 c 2 2 4 2 x m +1 3 x −1 m a b ⋅− a b 9 5 2 1 2 x − 1 2m + 1 2 2 x − 1 2m + 1 = ⋅ a b = a b 3 5 15
1 3 4 4 3 2 4 3 5 5 1 3 5 5 m n ⋅− a m n = amn = amn 8 5 40 10
7 2 3 14 4 1 a bc = − a 4bc 5. − abc ⋅ a = − 8 7 56 4
7.
3 m 2 3 1 3 m+1 3 a ⋅ − ab3 = ⋅ am + 1b 3 = a b 4 5 2 5 10
1 2 4 3 1 4 4 5 2 a ⋅ a b = ⋅ a 5b = a b = a 5b 2 5 2 5 10 5
3 3 4 5 3 1 x y ⋅ − a 2by 5 = a 2bx 3y 9 = a 2bx 3 y 9 5 6 6 2
11.
2 x +1 x − 3 2 44 x − 3 2 a b c ⋅− a b 11 7 4 8 = 2 ⋅ a 2 x − 2b x − 1c 2 = a 2 x − 2b x − 1c 2 7 7
12. −
1 3 3 m+1 1 m+1 a ⋅ am = a = a 3 5 15 5
EJERCICIO 38
3 m n 4 12 3m 2n 3 3m 2n a b ⋅ − a 2mbn = − a b =− a b 8 5 40 10
3 3 1 x a m ⋅− 5a 2m ⋅− am 5 10 15 2 + x 3 +1+ a 3 x+2 a+4 a m a m =− =− 50 10
8. −
1. a ⋅− 3a ⋅ a 2 = − 3a1+ 1+ 2 = − 3a 4 2. 3x 2 ⋅− x 3 y ⋅ − a 2 x = 3a 2 x 2 + 3 +1y = 3a 2 x 6 y 3. − m2n ⋅− 3m2 ⋅− 5mn3 = − 15m2 + 2 + 1n1+ 3 = − 15m5n4
9. 2a ⋅− a 2 ⋅ − 3a 3 ⋅ 4a = 24a1+ 2 + 3 + 1 = 24a7
4. 4a 2 ⋅− 5a 3 x 2 ⋅− ay 2 = 20a 2 + 3 +1x 2 y 2 = 20a 6 x 2 y2
10. − 3b 2 ⋅ − 4a 3b ⋅ ab ⋅− 5a 2 x
5. −am ⋅ − 2ab ⋅− 3a 2b x = − 6am +1+ 2b1+ x = − 6am + 3b x + 1 6.
7.
1 3 2 2 3 6 2 + 4 3 +1 1 x ⋅− a x ⋅− a 4m = a x m = a 6 x 4m 2 3 5 30 5 2 m 3 2 4 a ⋅ a b ⋅− 3a 4b x + 1 3 4 18 m + 2 + 4 4 + x + 1 3 a b =− = − a m + 6b x + 5 12 2
= − 60a 3 + 1+ 2 b 2 + 1+ 1x = − 60a 6b 4 x
11. a mb x ⋅− a 2 ⋅ − 2ab ⋅− 3a 2 x = − 6a m + 2 + 1+ 2b x + 1x = − 6am + 5b x + 1x
1 2 3 10 3 3 2 x y ⋅− xy 2 ⋅− x ⋅− x y 2 5 3 4 6 2 + 1+ 3 + 2 1+ 2 + 1 3 8 4 y = x = x y 8 4
12. −
EJERCICIO 39 1.
2. 8x 2 y − 3y 2
3x 3 − x 2 − 2x − 6x + 2x 4
2ax 3
3
16ax 5 y − 6ax 3 y 2
2 3. x − 4x + 3 − 2x
− 2x 3 + 8 x 2 − 6 x
3 2 4. a − 4a + 6a 3ab
3a 4b − 12a 3b + 18a 2b