求一道线性方程的解答,需要全过程,
2个回答

增广矩阵 =

1 1 1 1 1 1

3 2 1 1 -3 c

0 1 2 2 6 3

5 4 3 3 -1 d

r2-3r1,r4-5r1

1 1 1 1 1 1

0 -1 -2 -2 -6 c-3

0 1 2 2 6 3

0 -1 -2 -2 -6 d-5

r1+r2,r3+r2,r4-r2,r2*(-1)

1 0 -1 -1 -5 c-2

0 1 2 2 6 3-c

0 0 0 0 0 c

0 0 0 0 0 d-c-2

所以 c=0,d=2 时有解.此时增广矩阵化为

1 0 -1 -1 -5 -2

0 1 2 2 6 3

0 0 0 0 0 0

0 0 0 0 0 0

方程组的通解为:(-2,3,0,0,0)'+c1(1,-2,1,0,0)'+c2(1,-2,0,1,0)'+c3(5,-6,0,0,1)'