1/1X2+1/2X3+1/3X4+……1/2003X2004 用拆项法解决
1+x+x2+x3+x4=0,那1+x+x2+x3+x4+……+x2004=?
已知1+x+x2+x3=0,求x+x2+x3+…+x2004的值.
已知x3+x2+x+1=0,求x2004+x2003+……+x3+x2+x的值谢谢了,
x6+x5+x4+x3+x2+x+1=0,求x2003+x2004+x2005+x2006+x2007+X2008=?
求线性方程组 x2-x3-x4=0 x1+x2-x3+3x4=1 x1-x2+x3+5x4=-1 x1+2x2-2x3+
1+2x4-(x2+2x3)
X1+2X2-X3+X4=1
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
初一数学在线解答1/1x2+1/2x3+.+1/2002x2003+1/2003x2004+1/2004x2005