计算:1/x(x+3)+1/(x+3)(x+6)+...+1/(x+2004)(x+2007)
计算:(x+1)(x-2)(x-3)(x-6)
计算1/[x(x+3)]+1/[(x+3)(x+6)]+.+1/[(x+15)(x+18)]=?
计算1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3).+1/(x+2003)(x+2004)
计算x^2-5x+6/x^2-1/x^2+x/x-3
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算1/x(x+1) +1/x(x+1)(x+2) +1/x(x+2)(x+3) +.+1/x(x+2007)(x+20
计算:(3/x)+(x/x²-1)-(4/1-x)
计算 x(x+3)-(x-1)(x-2)
如何计算 (x+1)(x+2)(x+3)(x+4)
计算(X-1)(X-2)(X-3)(X-4)
计算x/(x^2-1) + (x^-x+1)/(x^3-x^2+x-1)+(x^2+x+1)/(x^3+x^2+x+1)
计算:(x-1)/(x^2+3x+2)+6/(2+x-x^2)-(10-x)/(4-x^2)