{ x1-x2-x3+x4=0 {x1-x2+x3+3x4=1 {x1-x2-2x3+3x4=-1/2 的通解 PS:" { " 是线性代数中的符号

用初等行变换来解下列线性方程组（1）2x1-x2+3x3=3 3x1+x2-5x3=0 4x1-x2+x3=3 x1+3x2-13x3=-6(2) x1-2x2+x3+x4=1 x1-2x2+x3-x4=-1 x1-2x2+x3-5x4=5(3) x1-x2+x3-x4=1 x1-x2-x3+x4=0 x1-x2-2x3+2x4=-1/2 解方程组(x1+2x2+2x3+x4=0,2x1+x2-2x3-2x4=0,x1-x2-4x3-3x4=0) 解非线性方程组 x1+2x2+2x3+x4=0 2x1+x2-2x3-2x4=0 x1-x2-4x3-3x4=0 求齐次线性方程组 X1+X2-X3-X4=0 2X1-5X2+3X3+2X4=0 7X1-7X2+3X3+X4=0 解方程组 x1+2x2+2x3+x4=0 2x1+x2-2x3-2x4=0 x1-x2-4x3-3x4=0 线性代数,x1+x2-3x3-x4=0 3x1-x2-3x3+4x4=0 x1+5x2-9x3-8x4=0 求线性方程组X1-X2-X3+X4=O X1-X2+X3-3X4=0 X1-X2-2X3+3X4=0 最好有具体过程 求齐次线性方程组通解X1-X2+5X3-X4=0X1+X2+4X3+3X4=03X1+X2+9X3+5X4=0 求线性方程组一般解,2X1+X2-2X3+3X4=03X1+2X2-X3+2X4=0X1+X2+X3-X4=0 求解齐次线性方程组...X1+X2+2X3-X4=0{ 2X1+X2+X3-X4=02X1+2X2+X3+2X4=0 解线性方程组（x1-x2+x3-x4=1,x1-x2-x3+x4=0,x1-x2-2x3+2x4=0.5) 已知x1,x2,x3,x4为实数,且x1+x2+x3+x4=6,x1^2+x2^2+x3^2+x4^2=12,求证:0= X1+X2-3X3-X4=1 3X1-X2-3X3+4X4=4 X1+5X2-9X3-8X4=0 解线性方程组 求非其次线性方程组 X1+X2-3X3-X4=1 3X1-X2-3X3+4X4=4 X1+X2-9X3-8X4=0 线性方程组怎么解?x1+x2+2x3-x4=02x1+x2+x3-x4=02x1+2x2+x3+2x4=0 x1+x3+x4=7 x2+x3+x4=6 x2+x1+x4=8 x2+x1+x3=9 求x1 x2 x3 x4 是多少? 齐次线性方程组{X1+X2+3X3+X4=0;2X1-X2+X3-3X4=0;X1+X3-X4=0}的基础解系 求齐次线性方程组 x1+x2+2x3-x4=0 -x1-3x3+2x4=0 2x1+x2+5x3-3x4=0 的一般解.