100/2x-100/3x=2-0.5

2x+3x+4x+5x+x+6x+7x=100 1X+2X+3X…+98X+99X+100X=50500X X等于多少? 1x+2x+3x+4x+5x+6x+7x…+99x=100 解方程：2x+4x+6x...+100x=1-(x+3x+5x+...+99x) x-2x+3x-4x+...+99x-100x=25 1+x+x^2+x^3+.+x^99+x^100 先化简再求值(x+3x+5x+7x+.+101x)-(2x+4x+6x+...100x),其中x=51分之2 已知x^4+x^3+x^3+x^2+x^1+1=0,求x^100+x^99+x^98+x^97+x^96的值 已知x^4+x^3+x^2+x^2+1=0,求x^100+x^99+x^98+x^97+x^96的值 1/x(x+1)(x+2)+1/(x+1)(x+2)(x+3).+1/(x+98)(x+99)(x+100)=? 已知x=100,求x(x+1)分之1+(x+1)(x+2)分之1+(x+2)(x+3)分之1+.+(x+99)(x+10 x^4+X^3+X^2+X^1+1=0求x^100+X^99+X^98+X^97+X^96的值