7.用克莱姆法则解线性方程组-|||- ) (x)_(1)+(x)_(2)+(x)_(3)+(x)_(4)=5 (x)_(1)+2(x)_(2)-(x)_(3

用克莱姆法则求解线性方程组 } 2x_1+x_2-5x_3+x_4=8x_1-3x_2 -6x_4=9 2x_2-x_3+2x_4=-5x_1+4x_

解线性方程组: (x)_(1)+(x)_(2)-5(x)_(3)+(x)_(4)=8 (x)_(1)+(x)_(2)-5(x)_(3)+(x

求非齐次线性方程组 ) (x)_(1)+(x)_(2)-3(x)_(3)-(x)_(4)=1 3(x)_(1)-(x)_(2)-3(x)_(3)+4(x)_(

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)_(

用消元法解下列线性方程组:-|||- x1+3x2+5x3-4x4 =1, x1+3x2+2x3-2x4+x5=-1, x1-2x2+x3-x4-x5=3, x

4.已知非齐次线性方程组-|||- ) (x)_(1)+5(x)_(2)-(x)_(3)-(x)_(4)=-1 (x)_(1)-2(x)_(2)+(x)_(3

已知非齐次线性方程组 ) (x)_(1)-5(x)_(2)+2(x)_(3)-3(x)_(4)=11 5(x)_(1)+3(x)_(2)+6(x)_(3)-(

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

已知非齐次线性方程组 ) (x)_(1)+(x)_(2)+(x)_(3)+(x)_(4)=-1 4(x)_(1)+3(x)_(2)+5(x)_(3)-(x)_