更新1:
但點解我用Method of Undetermined Coefficients找yp...好似計唔到你個ans... 我Let yp=Cx(Dcosx+Esinx)...
Partial Differentiation 4
回答 (1)
2010-08-04 7:09 pm
✔ 最佳答案
a)圖片參考：http://i388.photobucket.com/albums/oo325/loyitak1990/Aug10/STEVIE2.jpg
b)
圖片參考：http://i388.photobucket.com/albums/oo325/loyitak1990/Aug10/STEVIE3.jpg
http://i388.photobucket.com/albums/oo325/loyitak1990/Aug10/STEVIE2.jpg
http://i388.photobucket.com/albums/oo325/loyitak1990/Aug10/STEVIE3.jpg
2010-08-04 14:30:04 補充：
因為找 particular solution 的那個 f(x) 含有 sin 3x.
同時間 yc 亦有 sin 3x.
所以 method of undetermined coeff 係呢個 case not suitable.
參考: Myself
收錄日期: 2021-04-22 00:34:14
原文連結 [永久失效]:
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