(100/X)-(100/2X)=4
2x+3x+4x+5x+x+6x+7x=100
(X+X)+(X-X)+(X*X)+(X/X)=100
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
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
x^4+X^3+X^2+X^1+1=0求x^100+X^99+X^98+X^97+X^96的值
1.2(x-2)-3(4x-1)=9(1-x) 2.11x+64-2x=100-9x 3.15-(8-5x)=7x+(4
1/2x+1=1/2-1/3x x-2x+3x-4x+...+99x-100x=25
1X+2X+3X…+98X+99X+100X=50500X X等于多少?