PUMaC 2018 · 团队赛 · 第 5 题
PUMaC 2018 — Team Round — Problem 5
题目详情
- There exist real numbers a , b , c , d , and e such that for all positive integers n , we have √ n − 1 √ √ ∑ √ 5 5 4 3 2 5 4 3 2 n = ai + bi + ci + di + ei + 1 − ai + bi + ci + di + ei. i =0 Find a + b + c + d .
解析
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Original Explanation
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