[理工] [工數]-逆運算子
問一個小地方@@
1
------------- t
(D + 2i)^2+1
1
= ---------------t =>(A)
(D^2+4iD-4)+1
1 1
= ---- ------------- t =>(B)
-3 1- (4i/3)D
請問(A)=>(B)的步驟有人可以解說給我看嗎?
很感謝^^
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