Question
1
2 0
(c) If A =
0 3
A3
2 0 2 0 2 0
=
0 3 0 3 0 3
2
2 0 2 0
=
0 32 0 3
3
2 0
=
0 33
8 0
=
0 27
1
, Question
2
3 2 −1
(a) A = 1
6 3
2 −4 0
cij = (−1)i+j Mij
Matrix of co factors:
12 6 −16
C =4 2 16
12 −10 16
12 4 12
adj(A) = C t = 6 2 −10
−16 16 16
1
1
2 0
(c) If A =
0 3
A3
2 0 2 0 2 0
=
0 3 0 3 0 3
2
2 0 2 0
=
0 32 0 3
3
2 0
=
0 33
8 0
=
0 27
1
, Question
2
3 2 −1
(a) A = 1
6 3
2 −4 0
cij = (−1)i+j Mij
Matrix of co factors:
12 6 −16
C =4 2 16
12 −10 16
12 4 12
adj(A) = C t = 6 2 −10
−16 16 16
1
