问题描述： 但愿看得懂- - 答案是1/x-5 1个回答 分类：数学 2014-10-19 问题解答： 我来补答 1/(x-1)+1/(x-1)(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)+1/(x-4)(x-5)=1/(x-1)+1/(x-2)-1/(x-1)]+[1/(x-3)-1/(x-2)]+[1/(x-4)-1/(x-3)]+[1/(x-5)-1/(x-4)]=1/(x-1)+1/(x-2)-1/(x-1)+1/(x-3)-1/(x-2)+1/(x-4)-1/(x-3)+1/(x-5)-1/(x-4)=1/(x-5) 展开全文阅读
