x x+1 x-2 x-3 --- -- --- -- --- + --- =?x+1 x+2 x-3 x-4

熱心網友

x/(x+1) -(x+1)/(x+2)-(x-2)/(x-3)+(x-3)/(x-4)=[1-1/(x+1)]-[1-1/(x+2)]-[1+1/(x-3)]+[1+1/(x-4)]=1/(x+2)-1/(x+1)+1/(x-4)-1/(x-3)=1/(x+2)+1/(x-4)-[1/(x+1)+1/(x-3)]=2(x-1)[1/(x+2)(x-4)-1/(x+1)(x-3)]=16(x-1)/(x+2)(x-4)(x+1)(x-3)

熱心網友

有擴號嗎？？？？？？？？？老大你白癡

熱心網友

你這個是心理測試題吧！如果是，答案就在你自己心里。別人也無從回答。

熱心網友

你是外星人嗎:D

熱心網友

什么意思?是x(x+1)(x-2)(x-3)/(x+1)(x+2)(x-3)(x-4) + x(x+1)(x-2)(x-3)/(x+1)(x+2)(x-3)(x-4)=? 嗎?!

熱心網友

什么意思?不明白！