设矩阵A=(0-2130-2-230)求A-1
0 -2 1 1 0 0 1 1 -1 1 1 1 1 1 -1 1 1 1 1 1 -1 1 1 1
3 0 -2 0 1 0 = 1 3 -2 0 1 1 = 0 2 -1 -1 0 0 = 0 2 -1 -1 0 0
-2 3 0 0 0 1 -2 3 0 0 0 1 0 5 -2 2 2 3 0 1 0 4 2 3
1 0 -1 -3 -1 -2 1 0 -1 -3 -1 -2 1 0 0 6 3 4
= 0 0 -1 -9 -4 -6 = 0 1 0 4 2 3 = 0 1 0 4 2 3
0 1 0 4 2 3 0 0 1 9 4 6 0 0 1 9 4 6
6 3 4
A的逆矩阵= 4 2 3
9 4 6
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