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作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7235則
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6F推: 推~漂亮09/23 01:53
11F推: 應該不只是這樣啦^^ 因為把虛軸那邊的變量做Wick09/23 01:38
12F→: rotation以後,方程式會描述一個橢圓,這時「第二」09/23 01:39
13F→: 軸就現身了,趁現在計算他的一半長度即是虛半軸。09/23 01:40
2F推: 用正弦餘弦解三角形的方法可以硬爆出來...09/22 01:42
3F→: 但總覺得不是原出題者希望看到的解法XD09/22 01:43
8F→: 正是已經解決了啊?09/21 20:53
2F→: 看數字大小應該只能是(A)8。再看這是1-1的題目...09/14 00:46
3F→: 題目應該出錯了,要把小段當成一樣長去算。09/14 00:47
4F推: 我記得這題滿老的,也錯很久了。但是只要適當修正就09/14 14:46
5F→: 可以有好的解法。09/14 14:46
1F推: c=8-b代入第二式,對a,b都配方即可知道a,b的值。09/04 00:33
1F→: 通分硬做可得答案1608/30 00:51
1F→: 你想錯了,commutator subgroup裡不必是commutator08/26 22:46
8F推: 樓上的free group實例可以去找first fundamental gp08/26 23:08