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反拉式轉換求解
Feb 9th 2014, 12:32

上課老師教了部分分式求解的方法~給了一題回家作業~有給答案~可是不管怎算都算不出來~~不知道答案是否有錯~~請前輩幫幫忙

題目:{[16/3*(S+3)]除(S+1)*(S+2)^2}乘1/S

答案=4+(-32/3)e^-t+8/3*t*e^-2t+20/3*e^-2t

步驟越詳細越好~因為老師上課只教部分分式求解~希望也用這個方法解答~感謝!

以下是我解題構想不知道問題出在哪:

A/(S+1)+B/(S+2)^2+C/(S+2)+1/S 去求出ABC 然後帶入轉換公式~

老師上課說過 部分分式求解條件分母階數>分子階數,否則要先用長除法去拆解

到這邊我就卡住了~除出來有分子分母 不知道怎代'

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