1+1/1x2+1/2x3+1/2x3+1/3x4+...+1/2007x2008=?
1/1x2+1/2x3+1/3x4+1/4x5+.+1/2007x2008=多少 怎么计算
解方程组x1+x2=x2+x3=x3+x4=……=x2007+x2008=x2008+x2009=1,x1+x2+x3+
1/1X2+1/2X3+1/3X4+1/4X5+1/5X6……1/2007X2008
2/1X2+2/2X3+2/3X4+……+2/2007X2008等于多少(需要过程)急!
求线性方程组 x2-x3-x4=0 x1+x2-x3+3x4=1 x1-x2+x3+5x4=-1 x1+2x2-2x3+
X1+2X2-X3+X4=1
已知:X5+X4+X3+X2+X+1=0,求X2008+X2007+X2006+.+X809=?
1+2x4-(x2+2x3)
求齐次线性方程组x1+2x2+x3+x4+x5=1 2x1+4x2+3x3+x4+x5=2 -x1-2x2+x3+3x4
设线性方程组(x1+2x2-2x3+2x4=2,x2-x3-x4=1 x1+x2-x3+3x4=a)
具体写出方程组:2x1+x2-x3+x4=1;x1+2x2+x3-x4=2;x1+x2+2x3+x4=3的通解
解方程组X2+X3+X4=1 X1+X2+X3=5 X3+X4+X5=-5 X4+X5+X1=-3 X5+X1+X2=2