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作者 thisday 在 PTT [ Math ] 看板的留言(推文), 共559則
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1F推:5根號三?03/11 12:41
4F推:從另外一邊看啊XD03/03 22:57
1F推:102002/23 23:15
3F推:也可以用排容原理02/24 00:05
4F→:5^5-C(5,1)5^4+C(5,2)5^3-C(5,3)5^2+C(5,4)5-5=102002/24 00:06
6F推:= =02/16 16:54
3F推:XD02/07 14:48
8F推:看過N次了XD02/03 13:19
11F推:一樓正確02/03 11:30
7F推:(M,d) be a compact metric space01/18 23:44
8F推:疑! 樓上助教先回了!!01/18 23:46
10F推:推代導助教^^01/18 23:51
6F推:當年我唯一錯的一題 我選全部XDDDDD01/15 23:28
34F推:有些情況不需要除以二喔!01/08 17:02
35F推:bestforyou:要考慮到翻和轉出現一樣的情況01/08 17:05
36F推:翻(後相同)要考慮對稱性 轉要考慮週期性01/08 17:08
37F推:(3,3)=3 不等於1 所以要考慮週期性(循環性)01/08 17:19
38F→:好像很麻煩 既然數字這麼小 那就慢慢算好了...XD01/08 17:19
39F→:不盡相異物的環狀排列有點難度,珠狀排列更是...01/08 17:21
41F推:因為數字很小 慢慢畫 Ans:3...01/08 20:22