Question

求A的逆矩阵

Answer 1

|A|=11..故A逆存在.
A*=[-1 3 0
2 -7 -1
0 1 2]
A逆=(1/|A|)A*
=[-1/11 3/11 0
2 /11 -7/11 -1/11
0 1/11 2/11]