x(100-2x)=600
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x(100-2x)=600x(100-2x)=600x(100-2x)=600100X-2X^2=600X^2-50X+300=0(X-25)^2=325X=25±5√13原方程可以化为x^2-50x
x(100-2x)=600
x(100-2x)=600
x(100-2x)=600
100X-2X^2=600
X^2-50X+300=0
(X-25)^2=325
X=25±5√13
原方程可以化为x^2-50x+300=0
用求根公式
可以得x=25+10根号13或x=25-10根号13
x1=30 x2=20
(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
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
10x-x^2=600 x=?10x-x^2=600 x=?
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+2x+3x+.+100x