[閒聊] 這4三小

作者: fnm525 (xxxxx)   2021-04-18 02:22:53
https://upload.cc/i1/2021/04/18/pWSxwT.png
幹,這是三小
要怎麼出來一個級數解阿
作者: saturday5566 (星期六56)   2021-04-18 02:41:00
答案:π^4

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