x1 2x2 x3 x4 0
x1+x2+x3+x4=0 x1+x2+x3+x4=0 x1+x2+x3+x4=0 求解方程组...
x2+x4=0 ---(2)x1-x2+x3=0 --(3)x2-x3+x4=0---(4)(1)-(2)得：x1-x4=0， x1=x4 (3)+(4)得：x1+x4...
...求齐次线性方程组X1+X2+X3+X4=0,2X1+3X2+4X3+5X4=0...
所以,原方程组与方程组X1+X2+X3+X4=0,x2+2x3+3x4=0同解,令x3=1,x4=0,得到方程组的一个解为(1,-2,1,0)^T.再令...
求方程组通解 x1+x2=0 x2+x4=0 x1 - x2+x3=0 x2 - x3+x4=0...
简单计算一下即可，答案如图所示
求解X1+2X2+X3 - X4=0 3X1+6X2 - X3 - 3X4=0 5X1+10X2+X3 - 5X4=...
X1+2X2=X4 X3=0
设齐次线性方程组:x1+x2+x3+x4=0,x2 - x3+2x4=0,2x1+3x2...
|3 5 1 a+8| 化简，得：|1 1 1 1| |0 1 -1 2| |0 1 a 2| |0 2 -2 a+5| = |1 -1 ...
线性方程组 X1+X2+X3+X4=0,2X1+X2+X3+2X4=0,3X1+2X2+...
解: 增广矩阵 = 1 1 1 1 0 2 1 1 2 0 3 2 4 1 1 r3-r1-r2, r2-2r1 1 1 1 1 0 ...
...X1+x2+2X3 - X4=0 - X1 - 3x3+2x4=0 2X1+X2+5X3 - 3X4=0的...
自由未知量为4-2=2，又因为x1+3x3-2x4=0,x2-x3+x4=0,所以自由未知量是X3，x4，x1=2x4-3x3,x2=x3-x4 ...
求问一道线性代数的题目。如图,是如何求出x1,x2,x3,x4...
x3(e3-ε30=0 x4(e4-ε4)=0 又e1-ε1=0,所以，x1可以取任意的值，x1=k 而e2-ε2≠0,...
...x1+2x2+2x3+x4=02x1+x2 - 2x3 - 2x4=0x1 - x2 - 4x3 - 3x4=0...
系数矩阵A=122121-2-21-1-4-3,经过变换可得10-2-53012430000取x3=k1,x4=k2,则x1=2k1+53k2,x2=-2k1-43k2.通解为:x=k1...
已知齐次线性方程组x1+x2+x3+x4=0 ,2x1+3x2+(a+2)x3...
原式=（x+3y）/(x^2-y^2)-(x+2y)/(x^2-y^2)+(2x-3y)/(x^2-y^2)=(x+3y-x-2y+2x-3y)=2(x-y)/(x^...