2*(x/2-100)=2x-400
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2*(x/2-100)=2x-4002*(x/2-100)=2x-4002*(x/2-100)=2x-4002*(x/2-100)=2x-400x-200=2x-4002x-x=-200+400x=2
2*(x/2-100)=2x-400
2*(x/2-100)=2x-400
2*(x/2-100)=2x-400
2*(x/2-100)=2x-400
x-200=2x-400
2x-x=-200+400
x=200
2*(x/2-100)=2x-400
X-200=2X-400
2X-X=400-200
X=200
x =-160
x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
400=x^2+(x+x)^2
x+2x+3x+.+100x
f(x)=x^2+x (x
(20-2x)(20-2x)x>400 x=?
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
x^2=x