math brain teaser

来源: SeekingAlpha 于 2010-03-26 18:59:50 [] [旧帖] [给我悄悄话] 阅读数 : (164 bytes)

Suppose f is a function from real plane to real number (namely R^2->R), on any equilateral triangle ABC, f(A) + f(B) + f(C) = 0, prove that f is zero on any point.

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• 给定任意点，构造一个正六边形使其为其中一顶点 -继往开来- ♂ 给 继往开来 发送悄悄话 (196 bytes) () 03/26/2010 postreply 21:06:11

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