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作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7235則
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5F推: PERMUT07/19 21:46
1F推: 問題很大,舉個例子:w=-2時,v只能是1。你每個w都07/19 00:52
2F→: 多算到兩種v。07/19 00:52
3F推: 有遞迴的語言都可以啊……07/16 22:01
1F→: 沒有不能。不過要注意:你沒考慮到x=-7/4。07/12 01:07
2F→: 分段討論通常是最後才考慮的作法,因為比較繁複。07/12 01:08
3F推: 46.a+2 54.題目錯,+2yz要改成-2yz。07/10 16:20
19F推: 這題只要會畢氏定理就可以用各種方法做出來了啊。07/05 23:45
3F推: 空集合沒有任何元素,而且是任何集合的子集合。07/04 01:33
4F→: 只有一個元素的集合可以稱為單元集合。07/04 01:34
5F→: {{},{{}}}有兩個元素:{}和{{}}。且有四個子集合。07/04 01:35
6F→: 空集合{}是聯集運算的單位元素。07/04 01:37
2F推: equivalent不是相似。07/03 16:53
3F→: A 與 B 等價,意思是有一個 SL(2,Z) 的 Q 讓 A=Q'BQ07/03 16:56
8F→: 說真的看不出來有哪裡不一樣XD 其實是差不多的。06/30 22:36
2F→: 問題請在這裡問就好。06/30 01:10
3F→: x,y 要重複一遍須要θ增加2π。06/30 01:11