Question
7. Give the two matrices,
[1 2 3]
A =|1
0 1 2
[1 1
and B=
12
212
3 1 2
(a) Find det A, det B, det(AB), det(BA), det(5A), det A" and det(B®).
(b) Find adj A and adj B.
(c) Find A and Busing the adjoint matrices you found in part (b).
(d) Find (AB)-' and (BA)±.
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Transcribed Image Text

7. Give the two matrices, [1 2 3] A =|1 0 1 2 [1 1 and B= 12 212 3 1 2 (a) Find det A, det B, det(AB), det(BA), det(5A), det A" and det(B®). (b) Find adj A and adj B. (c) Find A and Busing the adjoint matrices you found in part (b). (d) Find (AB)-' and (BA)±.