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Linear Algebra and Its Applications, 6th edition David C. Lay Test Bank

Page 1

Type:

Test Bank

Resource:

Linear Algebra and Its Applications

Edition:

6th Edition

Author(s):

David C. Lay Steven Lay Judi McDonald


Exam Name___________________________________

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve the system of equations. 1) x1 - x2 + 3x3 = -8 2x1

1)

+ x3 = 0

x1 + 5x2 + x3 = 40

A) (8, 8, 0)

B) (0, -8, -8)

C) (-8, 0, 0)

D) (0, 8, 0)

2) x1 + 3x2 + 2x3 = 11

2)

4x2 + 9x3 = -12 x3 = -4

A) (1, -4, 6)

B) (-4, 1, 6)

C) (-4, 6, 1)

D) (1, 6, -4)

3) x1 - x2 + 8x3 = -107 6x1

3)

+ x3 = 17 3x2 - 5x3 = 89

A) (5, -8, -13)

B) (5, 8, -13)

C) (-5, -8, 13)

D) (-5, 8, 13)

4) 4x1 - x2 + 3x3 = 12 2x1

4)

+ 9x3 = -5

x1 + 4x2 + 6x3 = -32

A) (2, 7, -1)

B) (2, 7, 1)

C) (2, -7, 1)

D) (2, -7, -1)

5) x1 + x2 + x3 = 6 x1

5)

- x3 = -2 x2 + 3x3 = 11

A) (0, 1, 2)

B) No solution

C) (1, 2, 3)

D) (-1, 2, -3)

6) x1 + x2 + x3 = 7

6)

x1 - x2 + 2x3 = 7 5x1 + x2 + x3 = 11

A) (4, 1, 2)

B) (4, 2, 1)

C) (1, 4, 2)

1

D) (1, 2, 4)


7) x1 - x2 + x3 = 8

7)

x1 + x 2 + x 3 = 6 x1 + x2 - x3 = -12

A) (2, -1, -9)

B) (2, -1, 9)

C) (-2, -1, 9)

D) (-2, -1, -9)

8) 5x1 + 2x2 + x3 = -11

8)

2x1 - 3x2 - x3 = 17 7x1 + x2 + 2x3 = -4

A) (3, 0, -4)

B) (0, 6, -1)

C) (-3, 0, 4)

D) (0, -6, 1)

9) 7x1 + 7x2 + x3 = 1

9)

x1 + 8x2 + 8x3 = 8 9x1 + x2 + 9x3 = 9

A) (0, 1, 0) 10) 2x1 + x2

B) (0, 0, 1)

C) (1, -1, 1)

D) (-1, 1, 1)

=0

10)

x1 - 3x2 + x3 = 0 3x1 + x2 - x3 = 0

A) (0, 1, 0)

B) (0, 0, 0)

C) No solution

Determine whether the system is consistent. 11) x1 + x2 + x3 = 7

D) (1, 0, 0)

11)

x1 - x2 + 2x3 = 7 5x1 + x2 + x3 = 11

A) No

B) Yes

12) 5x1 + 2x2 + x3 = -11

12)

2x1 - 3x2 - x3 = 17 7x1 + x2 + 2x3 = -4

A) No

B) Yes

13) 4x1 - x2 + 3x3 = 12 2x1

13)

+ 9x3 = -5

x1 + 4x2 + 6x3 = -32

A) Yes 14) 2x1 + x2

B) No =0

14)

x1 - 3x2 + x3 = 0 3x1 + x2 - x3 = 0

A) Yes

B) No

2


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