Given the two matrices,
(a) Find det A, det B , det(AB) , det(BA) , det(5A) ,
(b) Find adj A and adj B
(c) Find
Given the two matrices,
(a) Find det A, det B , det(AB) , det(BA) , det(5A) ,
(b) Find adj A and adj B
(c) Find
Step 1
We have given the matrices
Step 2
Part(a)
Find det A:
=-1 Find det B:
=1
Step 3
Find det(AB) and det(BA)
According to determinant properties,
=-1
=-1
Step 4
Find det(5A)
=-125
Find
=-1
Find
=1
Step 5
Part (b)
Find adj A and adj B
The cofactors matrix is
Answer is given below (on video)
Find the following matrices: a)
(b)
(c) -4A.
(d)