用初等行变换求矩阵的逆矩阵
1 0 0
3 2 0
5 4 3
用初等行变换求矩阵的逆矩阵
1 0 0
3 2 0
5 4 3
1 0 0 1 0 0
3 2 9 0 1 0
5 4 3 0 0 1
1 0 0 1 0 0
0 2 9 -3 1 0
0 4 3 -5 0 1
1 0 0 1 0 0
0 2 9 -3 1 0
0 0-15 1 -2 1
1 0 0 1 0 0
0 2 9 -3 1 0
0 0 1-1/15 2/15 -1/15
1 0 0 1 0 0
0 2 0-12/5 -3/5 3/5
0 0 1-1/15 2/15 -1/15
逆矩阵为1 0 0
-6/5 -3/10 3/10
-1/15 2/15-1/15