判断下列方程组是否有解:
{x1-x2+x3=1
{3x1+4x3=5(P128)
{x1+2x2+2x2=0
【正确答案】:方程组的增广矩阵为
(A,β)=
(1 -1 1 ┆ 1
3 0 4 ┆ 5
1 2 2 ┆ 10)
→
(1 -1 1 ┆ 1
0 3 1 ┆ 2
0 3 1 ┆ -1)
→
(1 -1 1 ┆ 1
0 3 1 ┆ 2
0 0 0 ┆1-3)
故方程组无解.
判断下列方程组是否有解: {x1-x2+x3=1 {3x1+4x3=5(P128) {x1+2x2+2x2=0
- 2024-11-07 03:14:24
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