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作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7235則
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2F→:還有一條跟這條對稱的啊XD06/23 10:42
1F→:其中一個作法就是去把二元二次方程式寫出來XD06/21 14:18
1F→:就是1/G'(1)06/19 11:54
4F→:那為什麼會遇到這個積分@@06/18 21:39
2F→:祝你們有個美好的夏季職業是怎麼回事XD06/18 17:21
33F→:"每人至少得1書或1筆"不是"(每人至少得1書)聯集(每人06/18 13:45
35F→:至少得1筆)喔。06/18 13:45
1F→:不太好呢。均勻連續是說那個連續函數不會有變化太過06/17 11:01
2F→:劇烈的地方。06/17 11:02
3F→:不太好的理由是:你的白話比較像是連續函數。06/17 11:02
4F→:1. e 2. ln(a)06/15 21:37
7F→:1.的正常做法應該是:把1+1/ix用極坐標寫出來,即06/15 21:56
8F→:sqrt(1+1/x^2)*e^(-i*arctan(1/x)) 然後一起ix次方06/15 21:57
9F→:得到 sqrt(1+1/x^2)^ix * e^(x*arctan(1/x))06/15 21:57
10F→:後面那項趨近於e,這個應該很簡單。所以要做的是前項06/15 21:58
11F→:sqrt(1+1/x^2)^ix = e^(i*(x/2)*ln(1+1/x^2))06/15 21:59
12F→:再努力一點就知道前項會趨近於1了^^06/15 22:00
4F→:這應該是教甄吧06/13 22:01