Question

用初等变化法求矩阵A=?的逆矩阵.

Answer 1

1 3 -5 7 1 0 0 0

0 1 2 3 0 1 0 0

0 0 1 2 0 0 1 0

0 0 0 1 0 0 0 1

1 3 -5 0 1 0 0 -7

0 1 2 0 0 1 0 -3

0 0 1 0 0 0 1 -2～

0 0 0 1 0 0 0 1

1 3 0 0 1 0 5 -17

0 1 0 0 0 1 -1 -1

0 0 1 0 0 0 1 -2

0 0 0 1 0 0 0 1

1 0 0 0 1 -3 8 -14

0 1 0 0 0 1 -1 -1

0 0 1 0 0 0 1 -2

0 0 0 1 0 0 0 1

1 -3 8 -14

0 1 -1 -1

0 0 1 -2

0 0 0 1