判断下列方程组是否有解:
{x1-x2+x3=1
{3x1+4x3=5(P128)
{x1+2x2+2x2=0
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
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.