(100X+100-50)*(1+X)=66
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(100X+100-50)*(1+X)=66
(100X+100-50)*(1+X)=66
(100X+100-50)*(1+X)=66
(100x+50)×(1+x)=66
100x²+150x+50=66
(10x)²+150x+7.5²=16+7.5²
(10x+7.5)²=72.25
10x+7.5=±8.5
X1=0.1
X2=-1.6
所以方程的解是 x=-1.6或x=0.1
(X+X)+(X-X)+(X*X)+(X/X)=100
1x+(50-x)=100
x-50%x=100
y=|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|……+|x-99|+|x-100|+50n的最小值
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
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