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作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7170則
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5F→: 我覺得會教壞小孩XDDD08/10 14:46
6F→: 好像主要是流行在那些考研究所的補習班內。08/10 14:47
7F→: 逆運算子在找特解的速度上常常會比積分快,特別是那08/10 14:50
8F→: 一堆煩死人的分部積分。那些升學取向的補習班一定不08/10 14:51
9F→: 會把定義域的問題說清楚,這毋庸置疑。08/10 14:55
10F→: 話說,你不會覺得親切嗎?(-p^2+ω^2)\ψ什麼的。08/11 14:42
21F推: 那些基本列運算是不改變列空間啊。兩個空間剛好dim08/03 03:30
22F→: 一樣就是了。08/03 03:30
2F推: 一般常見強版本弱版本吧。08/02 13:10
7F推: 那個解析幾何做下去,分母用差角、半角,根號可以07/30 16:07
8F→: 開出來。分子用和差化積,剛好可以把分母約乾淨。07/30 16:07
9F→: 算出非整數度數大概是因為計算機位數取太少而產生07/30 16:07
10F→: 的誤差。07/30 16:07
1F推: x^3*sin(1/x)這種吧。07/28 04:32
12F推: 這絕對是否定的。07/22 23:41
13F→: 先找好向量和x,y,z,t,s之後把向量翻倍,那t跟s都要07/22 23:45
14F→: 砍半。重複數次直到有.5出現。07/22 23:45
29F推: 都用上和差化積了,那把cos(40度-x)跟sin(x+30度)拿07/19 17:01
30F→: 去化一下就可以看到答案了。07/19 17:01