作者查詢 / suhorng
作者 suhorng 在 PTT [ trans_math ] 看板的留言(推文), 共282則
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3F→:arccos端看你怎麼定義 通常會定義在[0,π]61.217.35.77 04/15 12:25
3F→:原PO應該是想對答案...61.217.35.77 04/14 08:09
7F推:解法支援 http://i.imgur.com/7RIdj.png ,61.217.32.127 04/04 08:53
8F→:你的算法是因為Γ積分表達式定義在 > 0處61.217.32.127 04/04 08:54
9F→:Thm5 是說 d/dx∫F(x,t)dt = ∫F_x(x,t)dt61.217.32.127 04/04 08:55
10F→:在不錯的條件下會成立,比如這題61.217.32.127 04/04 08:56
1F→:0吧?61.217.32.127 04/03 19:29
2F→:改成n^4之類才會是261.217.32.127 04/03 19:29
4F→:數學板k大解的你哪裡想要再詳細說明呢?61.217.32.239 03/03 09:12
1F推:負號移到log裡面變倒數 然後有理化分母61.217.32.168 02/25 15:41
1F推:若 f(x) 在 x=a 有極值且 f'(a) 存在61.217.34.226 02/23 21:58
2F→:則 f'(a) = 061.217.34.226 02/23 21:58
3F→:反過來說, 找極值要檢查 1. f'(x)=0 的點61.217.34.226 02/23 21:58
4F→:以及 2.f'(x) 不存在的點 3.區間端點61.217.34.226 02/23 21:59
1F→:啊...其實第三行只是在0的微分囧....59.115.150.253 02/17 09:48
1F推:1.萬一 x < 0 乘進根號會差個負號59.115.150.253 02/16 17:59
6F→:√(x^2) = |x|, 別忘了絕對值~59.115.150.253 02/16 18:18
1F→:畫出 r = sinθ 的圖跟 P 點沒關係吧59.115.150.253 02/15 21:21
2F→:題目這樣問, 可能面積會跟 P 點位置無關59.115.150.253 02/15 21:21
3F→:就隨便假設個 P 點然後算面積59.115.150.253 02/15 21:21