Find A - 1 by forming [A | I] and then using row operations to obtain [I | B], where A1 = [B]. Check that AA - 1 =I and A-1A =I. 1 -1 -1 A = 2 1 7 6 --..- Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A-1 O A. (Type an integer or a simplified fraction for each matrix element.) O B. The matrix does not have an inverse.
Find A - 1 by forming [A | I] and then using row operations to obtain [I | B], where A1 = [B]. Check that AA - 1 =I and A-1A =I. 1 -1 -1 A = 2 1 7 6 --..- Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A-1 O A. (Type an integer or a simplified fraction for each matrix element.) O B. The matrix does not have an inverse.
Chapter7: Systems Of Equations And Inequalities
Section7.6: Solving Systems With Gaussian Elimination
Problem 3SE: Is there only one correct method of using row operations on a matrix? Try to explain two different...
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Question
12-8
![Find A-1
by forming [A | ] and then using row operations to obtain [I | B], where A-1 = [B]. Check that AA-1 =I and A -1A = 1.
1 -1 - 1
A =
2
1
7
---.-
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
- 1
A
O A.
(Type an integer or a simplified fraction for each matrix element.)
%3D
O B. The matrix does not have an inverse.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F12400ac6-d36f-4dfb-a291-490b1b5697d1%2F5ab1a3a5-d476-4f8d-83fa-9c939b44817f%2Ff6lx1tf_processed.png&w=3840&q=75)
Transcribed Image Text:Find A-1
by forming [A | ] and then using row operations to obtain [I | B], where A-1 = [B]. Check that AA-1 =I and A -1A = 1.
1 -1 - 1
A =
2
1
7
---.-
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
- 1
A
O A.
(Type an integer or a simplified fraction for each matrix element.)
%3D
O B. The matrix does not have an inverse.
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