Laplace Transform

👨🏻‍🏫 學術台數學

Mabel

2010-12-13 12:35 pm

plz briefly explain the following::

圖片參考：http://img17.imageshack.us/img17/9372/laplace.png
就好似, 點解一度係加, 一度係減

回答 (1)

用戶9112

2010-12-13 2:59 pm

✔ 最佳答案

http://img696.imageshack.us/img696/3936/51080238.png

圖片參考：http://img696.imageshack.us/img696/3936/51080238.png

2010-12-13 18:42:03 補充：
另外你可以這樣考慮
L{f(t).u(t-a)} = L{f(t-a+a).u(t-a)}=e^(-as) L{f(t+a)}
L{f(t+3)}=L{t^2+6t+9+2t+6} = {t^2 + 8t +15}

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