[理工] [工數]拉式逆轉換
又一題拉式逆轉換，感覺好難
解好久都解不出來.....
S
--------------------
(S+2)^2(S^2+2S+10)^2
解答是(1/500-t/50)e^-2t + 1/500[(-e^-t)cos3t+11(e^-t)sin3t/3]
+[(e^-t)sin3t]*[(e^-t)sin3t]/45 -[(e^-t)sin3t]*[(e^-t)cos3t]/50
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