1/2+(1/3+2/3)+(1/4+2/4+3/4)+(1/5+2/5+3/5+4/5)+……+(1/60+2/60+……+58/60+59/60)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 08:42:01
![1/2+(1/3+2/3)+(1/4+2/4+3/4)+(1/5+2/5+3/5+4/5)+……+(1/60+2/60+……+58/60+59/60)](/uploads/image/z/13387-67-7.jpg?t=1%2F2%2B%EF%BC%881%2F3%2B2%2F3%EF%BC%89%2B%EF%BC%881%2F4%2B2%2F4%2B3%2F4%EF%BC%89%2B%EF%BC%881%2F5%2B2%2F5%2B3%2F5%2B4%2F5%EF%BC%89%2B%E2%80%A6%E2%80%A6%2B%EF%BC%881%2F60%2B2%2F60%2B%E2%80%A6%E2%80%A6%2B58%2F60%2B59%2F60%EF%BC%89)
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1/2+(1/3+2/3)+(1/4+2/4+3/4)+(1/5+2/5+3/5+4/5)+……+(1/60+2/60+……+58/60+59/60)
1/2+(1/3+2/3)+(1/4+2/4+3/4)+(1/5+2/5+3/5+4/5)+……+(1/60+2/60+……+58/60+59/60)
1/2+(1/3+2/3)+(1/4+2/4+3/4)+(1/5+2/5+3/5+4/5)+……+(1/60+2/60+……+58/60+59/60)
1/2+(1/3+2/3)+(1/4+2/4+3/4)+(1/5+2/5+3/5+4/5)+……+(1/60+2/60+……+58/60+59/60) =0.5+1+1.5+2……+29.5 =30*59/2 =885