(-1+1/100)x(-1+1/101)x(-1+1/102)x...x(-1+1/2006)怎么做

(-1+1/100)x(-1+1/101)x(-1+1/102)x...x(-1+1/2006)怎么做 |x+3|-|2x-1|+|x-2|>1怎么做 f(x)=x-ln(1+x)怎么做呢 (x-3)(x+5)-(x+1)²这道题怎么做? lim(sin(x^2*cos(1/x)))/x怎么做? 2x/(x^2+x)-1/x=5/(x+1)怎么做? 1+x+x^2+x^3+.+x^99+x^100 x+1 x x x+1 x²/x-1+x/1-x怎么化简 （2x²-3x+1）²-22x+33x-1怎么做? [3-2x/1-x]-1=[x+2/x-3]怎么做 (6x+7)(6x+7)(3x+4)(x+1)=6 怎么做啊