x x+1 x-2 x-3 --- -- --- -- --- + --- =?x+1 x+2 x-3 x-4
热心网友
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)
热心网友
有扩号吗？？？？？？？？？老大你白痴
热心网友
你这个是心理测试题吧！如果是，答案就在你自己心里。别人也无从回答。
热心网友
你是外星人吗:D
热心网友
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)=? 吗?!
热心网友
什么意思?不明白！