Q2. Let a b c A = |d g h Assuming that det(A) = -7, find (a) det(3A) (b) det(A) (c) det(2A) a d (d) det((2A)) (e) det b h f

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter6: Matrices And Determinants
Section: Chapter Questions
Problem 11CC
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Q2.
Let
a
A = |d
f
e
Assuming that det(A) = -7, find
(a) det(3A)
(b) det(A)
(c) det(2A-)
g d
(e) det b h
a
(d) det((2A))
ci
Q3. Decide whether the matrix is invertible, and if so, use the adjoint met
its inverse
2
5
5
2
3
A =
-1
-1
A =
3
2
2
3
-2
-4
Transcribed Image Text:Q2. Let a A = |d f e Assuming that det(A) = -7, find (a) det(3A) (b) det(A) (c) det(2A-) g d (e) det b h a (d) det((2A)) ci Q3. Decide whether the matrix is invertible, and if so, use the adjoint met its inverse 2 5 5 2 3 A = -1 -1 A = 3 2 2 3 -2 -4
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