问题描述: 1/2+1/6+1/12+1/20+1/30+...+1/9702+1/9900 1个回答 分类:数学 2014-12-15 问题解答: 我来补答 1/2+1/6+1/12+1/20+1/30+...+1/9702+1/9900=1/(1*2)+1/(2*3)+1/(4*5)+1/(5*6)+……+1/(98*99)+1/(99*100)=(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+……+(1/98-1/99)+(1/99-1/100)=1-1/100=99/100 展开全文阅读