作者查詢 / kimkimkimkim
作者 kimkimkimkim 在 PTT [ Grad-ProbAsk ] 看板的留言(推文), 共108則
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10F推:特解跟奇異解定義不一樣阿07/16 21:18
28F推:C不用帶∞ 但帶很大的話 可看成0 不要侷限在∞07/19 01:19
29F→:C=10000000000000000000000000000000000000000007/19 01:20
30F推:其實我知道了 如果令u=y/x 運算過程中 確實 u=\=107/19 01:36
31F→:y/x =/= 1 y=/=x 如果y=x為奇異解07/19 01:37
32F推:帶入式中成立 當為特解 然後再令v=ux在算其通解07/19 01:40
33F→:如果c=∞ 特解即為奇異解 但奇異解只有一個07/19 01:41
34F→:特解無窮多(包含奇異解那項，如果包含c=∞的話)07/19 01:42
35F→:如果定義不包含無窮大 則 y=x為奇異解另外寫07/19 01:43
36F→:如果包含C無窮大 則特解無需另外寫07/19 01:44
37F→:個人淺見07/19 01:44
38F→:但如果不爭執這一點的話 我是認為直接求07/19 01:46
39F→:再來定義u-1在分母的情形07/19 01:46
40F→:而且在一階的特解通常用觀察得知 定義為只要帶入原07/19 01:48
41F→:式成立的話 就可說他為特解 只是原PO剛好看到的特07/19 01:49
42F→:解即為本題之奇異解07/19 01:49
43F→:抱歉打了這麼多07/19 01:49
5F推:是嗎 我反回去會對欸 我去查個書一下07/04 21:03
4F推:-3t+4cosh2t+2sinh2t06/30 17:38
5F→:應該是這樣吧06/30 17:38
6F→:因為cosh跟sinh本來就是由exp合成的 所以是互通的06/30 17:40