[理工] [工數]-運算子積分
1.
∞ z^n ∞ 1
Given complex series f(z) = Σ ------ + Σ ------
n=0 2^n+1 n=1 z^n
a. is z=0 a singular point? Prove it.
b.Find the residue at z=0
2.
2 ∞
x"+m x = Σ bn sin nt , x(0)=0 , x'(0)=0
n=0
請問這題可以用運算子算嗎?
我算出來跟解答算的差一項..
解答的答案是用拉式算的
謝謝..
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