设线性方程组${X}_{1}+{X}_{2}-{X}_{3}=-1$
$2{X}_{1}+K{X}_{2}-2{X}_{3}=0$
$K{X}_{1}+2{X}_{2}+{X}_{3}=K$
（1）K为何值时,方程组有唯一解、无解.
（2）K为何值时,方程组有无穷多解?并求出其通解.
[题目]设线性方程组 _(1)+(X)_(2)-(X)_(3)=-1-|||-(X)_(1)+K(X)_(2)-2(X)_(3)=0-|||-(X)_(1)+2
如果线性方程组 ) 3(x)_(1)+k(x)_(2)-(x)_(3)=1 4(x)_(2)-(x)_(3)=2 4(x)_(2)+k(x)_(3)=3 .
对于线性方程组 ) 2(x)_(1)+3(x)_(2)=-1 (x)_(1)-2(x)_(2)=3 .对于线性方程组，下列错误的选项是。系数行列式为该方程组
方程组 ) (x)_(1)+(x)_(2)+(x)_(3)=1 (x)_(1)+2(x)_(2)-(x)_(3)=2 (x)_(1)+k(x)_(2)+(x)
5.线性方程组 ) (x)_(1)-(x)_(2)=(a)_(1) 2(x)_(2)-(x)_(3)=(a)_(2) (x)_(1)+(x)_(2)-(x)
线性方程组-|||-线性方程组-|||- ) 2(x)_(1)-3(x)_(2)=2, (x)_(1)+4(x)_(2)=-1 .-|||-的矩阵表示式为
5.简答题2.设齐次线性方程组}x_(1)+kx_(2)+x_(3)=0kx_(1)+x_(2)-x_(3)=02x_(1)+x_(2)+x_(3)=0问k取何
16.线性方程组 ) (x)_(1)+(x)_(3)=0 2(x)_(2)+(x)_(3)=0 2(x)_(1)+3(x)_(2)=0 .16.线性方程组用
给定线性方程组 ) (x)_(1)+(x)_(2)+(x)_(3)=a-3 (x)_(1)+a(x)_(2)+(x)_(3)=-2 (x)_(1)+(x)_(
已知线性方程组 ) a(x)_(1)+(x)_(3)=1 (x)_(1)+a(x)_(2)+(x)_(3)=0 (x)_(1)+2(x)_(2)+a(x)_(