x1-2x2+3x3-4x4=4①
x2-x3+x4=-3②
x1+3x2-3x4=1③
③-①,5x2-3x3+x4=-3,④
④-②*3,2x2-2x4=6,设x4=C,则
x2=C+3,
代入③,x1=-8,
代入②,x3=6.
您的答案不全对.
解下列线性方程组,感激不尽x1-2x2+3x3-4x4=4x2-x3+x4=-3x1+3x2-3x4=1答案x1=-8,
1个回答
相关问题
-
解线性方程组x1+x2+3x3+4x4=5 2x1+4x2+4x3+6x4=8 -x1-2x2-x3-2x4=-3
-
解线性方程组（1）2x1-x2+x3-2x4=7 （2）x1+2x2-3x3=-4 （3）-x1-x2+x3+4x4=4
-
求线性方程组x1-3x2-2x3-x4=1,3x1-8x2-4x3-x4,-2x1+x2-4x3+2x4=1,-x1-2
-
感激不尽求线性方程组基础解系x1+x2+3x4-x5=0x1-x2+2x3-x4=04x1-2x2+6x3+3x4-4x
-
求线性方程组一般解2x1+x^2-x3+x4=13x1-2x^3+x3-3x4=4x1+4x^2-3x3+5x4=-2
-
.解线性方程组｜X1+X2+X3+X4=5 ｜X1+2X2-X3+4X4=-2 ｜2X1-3X2-X3-5X4=-2 ｜
-
解含有参数的线性方程组 2x1-x2+5x3+px4=5 x1-x2+2x3+3x4=4 4x1-3x2+9x3+8x4
-
解下列线性方程组.x1+x2-3x4-x5=0,x1-x2+2x3-x4=0,4x1-2x2+6x3+3x4-4x5=0
-
求线性方程组 2 x1+3 x2+x3=4;x1-2 x2+4 x3=-5;3 x1+8 x2-2 x3=13;4 x1
-
线性方程组为：x1-x2-5x3+4x4=2 2x1-x2+3x3-x4=1 3x1-2x2-2x3+3x4=3 7x1