x1+5x2-x3-x4=-1

问题描述:

x1+5x2-x3-x4=-1
x1-2x2+x3+3x4=3
3x1+8x2-x3+x4=1

增广矩阵经行变换化成 (字数限制)
1 0 3/7 13/7 13/7
0 1 -2/7 -4/7 -4/7
0 0 0 0 0
通解为:(13/7,-4/7,0,0)'+c1(3,-2,-7,0)'+c2(13,-4,0,-7)',c1,c2 为任意常数