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作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7235則
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1F推: s/(1+c) = (1-c)/s,然後合分比。09/07 17:43
2F→: 最簡單暴力的作法就是相減通分。09/07 17:43
23F推: 我記得那應該也是個line bundle啊?09/07 02:26
1F→: 還有 (a,bab) 和 (b,aba) 各兩種,所以是 38 種。09/06 01:29
7F推: 承cheesesteak,AD:AB=半徑比=2:3,所以AD=10。然後08/25 20:24
8F→: BD=15-10=5,最後用切冪:BC^2=BD*BA=5*15=75。08/25 20:25
10F→: 算是外冪的一種。08/26 00:56
7F推: 這不會對啦,EDF那項右式=0……Geogebra是對的,這08/23 00:47
8F→: 題別想用簡單方式算出來XD08/23 00:47
19F推: 數字是鍊成陣,真理之門還在後面:)08/21 22:45
6F→: m+33 和 n+33。08/12 22:08
9F推: 2.畫圖找:過B,D且切射線CA的圓 或08/12 22:38
10F→: 假設AC長2x,用x寫出tan∠BAD。08/12 22:39
11F→: 最後答案都是 (4√6+3√3)/23。08/12 22:39