系数矩阵= 1 -1 -1 1 1 -1 1 -3 1 -1 -2 3 r2-r1,r3-r1 1 -1 -1 1 0 0 2 -4 0 0 -1 2 r2*(1/2),r1+r2,r3+r2 1 -1 0 -1 0 0 1 -2 0 0 0 0 方程组的通解为:c1(1,1,0,0)'+c2(1,2,0,1)'.
