(100-x)*3/1+3x=100

1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)= 解方程：2x+4x+6x...+100x=1-(x+3x+5x+...+99x) 1X+2X+3X…+98X+99X+100X=50500X X等于多少? 1x+2x+3x+4x+5x+6x+7x…+99x=100 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 f(x)=x(x-1)(x+2)(x-3)(x+4)……(x+100),求f'(1) x-2x+3x-4x+5x.+99x-100x=25求解 2x+3x+4x+5x+x+6x+7x=100 3x=x+100 x=? 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+100)分之1 x+2x+3x+.+100x 1/x(x+1)(x+2)+1/(x+1)(x+2)(x+3).+1/(x+98)(x+99)(x+100)=? x^4+X^3+X^2+X^1+1=0求x^100+X^99+X^98+X^97+X^96的值 1/2x-8 x+3x+(1/2x-8)=100 x=? 1/2x-8 x+3x+(1/2x-8)=100 =x? 已知x^4+x^3+x^2+x+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的值见上 已知x^4+x^3+x^2+x+1=0,求x^100+x^99+x^98+x^97+x^96的值