x（x-1）分之1+（x—1）（x-2）分之1+（x-2）（x-3）分之1+（x-3）（x-4）分之1 （x=104）
人气：126 ℃ 时间：2020-09-12 04:23:17
解答
1/(x-1)+1/(x-1)(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)=[(x-2)+1]/(x-1)(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)=1/(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)=[(x-3)+1]/(x-2)(x-3)+1/(x-3)(x-4)=1/(x-3)+1/(x-3)(x-4)=1/(x-4)=1/(x-4)带...
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