(6*(1^(-2)+2^(-2)+3^(-2)+4^(-2)+5^(-2)+...+n^(-2)+...))^0.5=??
please explain, show steps and result~~
收錄日期: 2021-04-12 23:24:52
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061101000051KK04449