問個排列組合問題：從n個數中取m個數字，共有多少個無重複組合？記得有公式，網上找不到可信的！

來源: sam 於 2023-06-01 17:02:10 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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