系数矩阵 A=
1 -2 -1 -1 5
2 1 -1 2 -3
3 -2 -1 1 -2
2 -5 1 -2 2
用初等行变换化为行最简形
1 0 0 0 7/4
0 1 0 0 2
0 0 1 0 -2
0 0 0 1 -21/4
得方程组的基础解系:(7,8,-8,-21)^T通解为:c(7,8,-8,-21)^T.
系数矩阵 A=
1 -2 -1 -1 5
2 1 -1 2 -3
3 -2 -1 1 -2
2 -5 1 -2 2
用初等行变换化为行最简形
1 0 0 0 7/4
0 1 0 0 2
0 0 1 0 -2
0 0 0 1 -21/4
得方程组的基础解系:(7,8,-8,-21)^T通解为:c(7,8,-8,-21)^T.