數學：排列組合題:Realtime－線上遊戲排行榜2013/2014,進擊的巨人線上看,candy crush saga外掛,正妹寫真三圍

Apr 25 Fri 2014 06:24
數學：排列組合題:Realtime

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數學：排列組合題

Apr 24th 2014, 15:01

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以 a,<b>e</b>,i,o,u 五個字母取 4 個排列，可以重复，求： 1. 4 個字母重复的排列 2. 3 個字母重复的排列 3. 2 個字母重复的排列...

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