2 4 Let A = 0 3 5 1 -2 3 −1 (a) Find det(A) using the cofactor expansion along the third column. Justify your answer in details. (b) Find A-¹ using the adjoint method. Justify your answer in details.

Algebra and Trigonometry (6th Edition)
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ISBN:9780134463216
Author:Robert F. Blitzer
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ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Let A =
2 4
-2
03
3
5 1 -1
(a) Find det(A) using the cofactor expansion
along the third column. Justify your answer in
details.
-1
(b) Find A-¹ using the adjoint method. Justify
your answer in details.
Transcribed Image Text:Let A = 2 4 -2 03 3 5 1 -1 (a) Find det(A) using the cofactor expansion along the third column. Justify your answer in details. -1 (b) Find A-¹ using the adjoint method. Justify your answer in details.
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