Problem 1 (a). Use cofactor expansion to find a such that the 8 1 1 determinant of M = 7 is 7. Show all your 1 25 4 3 0 3 a -5 0 work.

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter11: Matrices And Determinants
Section11.4: Determinants And Cramer's Rule
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Problem 1
(a).
Use cofactor expansion to find a such that the
8
1
1
determinant of M =
7
is 7. Show all your
3
1
MAT25
4 3
a -5
work.
(b) [
For which value of a is M not invertible? Show
all your work.
r, y
Transcribed Image Text:Problem 1 (a). Use cofactor expansion to find a such that the 8 1 1 determinant of M = 7 is 7. Show all your 3 1 MAT25 4 3 a -5 work. (b) [ For which value of a is M not invertible? Show all your work. r, y
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