解下列线性方程组 ) (x)_(1)+2(x)_(2)+3(x)_(3)=1 2(x)_(1)+2(x)_(2)+5(x)_(3)=2 3(x)_(1)+5(x)_(2)+(x)_(3)=3 .

5.线性方程组 ) (x)_(1)-(x)_(2)=(a)_(1) 2(x)_(2)-(x)_(3)=(a)_(2) (x)_(1)+(x)_(2)-(x)

3.利用逆矩阵求解下列线性方程组:-|||-(2) ) (x)_(1)-(x)_(2)-(x)_(3)=2 2(x)_(1)-(x)_(2)-3(x)_(3

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)_(

4.利用逆矩阵解下列线性方程组:-|||-(1) ) (x)_(1)-(x)_(2)+2(x)_(3)=1, -2(x)_(1)-(x)_(2)-2(x)_

解线性方程组_(1)-2(x)_(2)+(x)_(3)=-2-|||-__ __-|||-(x)_(1)+(x)_(2)-3(x)_(3)=1-|||--(x)

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

3.求解线性方程组 ) (x)_(1)+2(x)_(2)-(x)_(3)+2(x)_(4)=1 2(x)_(1)+4(x)_(2)+(x)_(3)+(x)_(

求解下列非齐次线性方程组:-|||-(1) ) 4(x)_(1)+2(x)_(2)-(x)_(3)=2, 3(x)_(1)-(x)_(2)+2(x)_(3)

线性方程组 ) (x)_(1)+2(x)_(2)-2(x)_(3)=1 2(x)_(1)+4(x)_(2)-4(x)_(3)=2 3(x)_(1)+6(x)_

15.分别应用克拉默法则和逆矩阵解下列线性方程组:-|||-(1) ) (x)_(1)+2(x)_(2)+3(x)_(3)=1 2(x)_(1)+2(x)_