PUMaC 2008 · 代数（A 组） · 第 5 题
PUMaC 2008 — Algebra (Division A) — Problem 5
题目详情
- (4 points) Let H = for all positive integers k . Find an closed-form expression for H k k i =1 k =1 i in terms of n and H . n 1 4
解析
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Original Explanation
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