[其他] 知道生成函數的closed form求係數
請問已經知道生成函數用公式化簡完是
1/(1-z^10)(1-z^20)(1-z^50) 之後想求
z^100的係數該如何作呢?
我只知道可以把他們拆成相加去看,但也不知道怎麼拆,請問一般都是用什麼方法??
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※ 編輯: jouen (39.9.68.94), 12/16/2015 11:40:21
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