(600-X)/100+X/100/2=7
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(600-X)/100+X/100/2=7(600-X)/100+X/100/2=7(600-X)/100+X/100/2=7（600-x)/100+x/100/2=7两边同时乘100,得（600-x
(600-X)/100+X/100/2=7
(600-X)/100+X/100/2=7
(600-X)/100+X/100/2=7
（600-x)/100+x/100/2=7
两边同时乘100,得（600-x)+2x=700
整理得 x=100
（X+X)+(X-X)+(X*X)+(X/X)=100
x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
600-25X+100X-5X^2=840
x(100-2x)=600
x+2x+3x+.+100x
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
100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495
100×2x+10x+3x+216=100×3x+10×2x+x
设函数f(x)=(x-1)(x-2)...(x-100)(x>100),求F'(X)
f(x)=x(x-1)(x-2)…(x-99)(x-100),求f'(100)
解方程:x-2x+3x-4x+...+99x-100x=25
解方程：x-2x+3x-4x+.+99x-100x=25
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