3 2 -1 -3 -1
2 -1 3 1 -3
7 0 5 -1 -8→
1 3 -4 -4 2
0 -7 11 9 -7
0 -21 33 27 -22→
1 3 -4 -4 2
0 -7 11 9 -7
0 0 0 0 1 →
秩=3
1 0 5/7 -1/7 0
0 1 -11/7 -9/7 0
0 0 0 0 1 →
怎么算都没法化成行最简ORZ,求矩阵的秩
3 2 -1 -3 -1
2 -1 3 1 -3
7 0 5 -1 -8→
1 3 -4 -4 2
0 -7 11 9 -7
0 -21 33 27 -22→
1 3 -4 -4 2
0 -7 11 9 -7
0 0 0 0 1 →
秩=3
1 0 5/7 -1/7 0
0 1 -11/7 -9/7 0
0 0 0 0 1 →