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作者 oaoa0123 在 PTT [ SENIORHIGH ] 看板的留言(推文), 共77則
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12F→: 知道一個基測滿分的在醫學系04/20 20:36
69F噓: 中國醫藥學系並不差啊。04/20 20:34
14F→: 第九題: 令向量CB = (x,y),CB與BA的夾角為45度,04/10 21:09
15F→: 且CB與BA的長度相同。利用內積定義得到方程式04/10 21:10
16F→: 數字很簡單可以輕易解出04/10 21:11
21F推: 同樓上所說,你自己展開就知道這題數字很漂亮....04/11 03:00
22F→: 我是算過才推文的04/11 03:00
8F→: 《如何學好中學化學》去看看吧04/02 01:28
11F→: 不需要微分就可以做到04/01 20:58
12F→: x/l(x)= x/sqrt(x^2-8x+25)= 1/sqrt(1-8/x+25/x^2)04/01 20:59
13F→: 分母是1/x的二次多項式,最小值發生在1/x=4/25時04/01 21:00
14F→: 故[x/l(x)]max=1/sqrt(1-8(4/25)+25(4/25)^2)=5/304/01 21:01
8F推: as 大部分的意思都可以用"以...作為" 去想04/01 20:11
9F→: 我們用美國人在日本交換名片做例子04/01 20:11
55F噓: 釣出一堆新警察03/24 14:28
22F噓: 師大XD03/20 02:12
9F推: 其實大學再弄懂也沒差,只是解二階線性微分方程而已03/20 02:07
58F推: 推 辛苦了118.168.86.221 02/15 23:37