It is the coefficient of x^92 of

来源: 乱弹 于 2007-12-18 19:35:20 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (92 bytes)
回答: Unlimited $0.50, $0.20, $0.10, $0.05, $0.01 coins. 由 janewwwu 于 2007-12-18 17:40:35

(1+x+x^2+...)(1+x^5+x^10+...)...(1+x^50+...).

You can try small examples to verify.

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• I'm 10 year old kid. Please use very simple working. -janewwwu- ♀ 给 janewwwu 发送悄悄话 (0 bytes) () 12/18/2007 postreply 19:54:50

• 回复：I'm 10 year old kid. Please use very simple working. -乱弹- ♂ 给 乱弹 发送悄悄话 乱弹 的博客首页 (564 bytes) () 12/19/2007 postreply 18:18:29

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