PUMaC 2007 · 代数（A 组） · 第 9 题
PUMaC 2007 — Algebra (Division A) — Problem 9
题目详情
- Find the value of x + y for which the expression 2 2 6 x 6 y 4 2 2
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- 9 x y + 6 6 6 6 y x x y is minimized. 5 3
解析
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Original Explanation
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