用初等行变换化下列矩阵为行最简形 2 3 1 -3 -7 1 2 0 -2 -4 3 -2 8 3 0 2 -3 7 4 2

问题描述:

用初等行变换化下列矩阵为行最简形 2 3 1 -3 -7 1 2 0 -2 -4 3 -2 8 3 0 2 -3 7 4 2
2 3 1 -3 -7
1 2 0 -2 -4
3 -2 8 3 0
2 -3 7 4 2

r1-2r2,r3-3r2,r4-2r20 -1111120 -2 -40 -889 120 -778 10 r1*(-1),r2-2r1,r3+8r1,r4+7r101 -1 -1 -11020 -20001400013 r1+r3,r4-r301 -1031020 -2000...