PUMaC 2007 · 代数（B 组） · 第 6 题
PUMaC 2007 — Algebra (Division B) — Problem 6
题目详情
- If a , b , and c are real numbers such that a + b + c = 6 and ab + bc + ca = 9, find the sum of all possible values of the expression b a c + b b c + b c c . 2
解析
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Original Explanation
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