美国的数学竞赛难不难看看这道题就知道了
今天的题目是排列组合问题,来自美国的一次数学竞赛,解题所用知识不超过小学5年级. 题目(5星难度):有一个九边形的各边长...
AIME是选拔美国奥数队的竞赛,共15题,答对7题已经是相当不错... 2019.08.22 20:00-21:00主讲内容:CCC滑铁卢计算机竞赛本期福...
2009 USAMO Problems真题及答案 完整版真题免费下载 +答案解析请参考文末 真题下载请前往【纯真题】小程序 Day 1 Problem 1 Given circles and intersecting at points and , let be a line through the cent...
2010 USAMO Problems真题及答案 完整版真题免费下载 +答案解析请参考文末 Day 1 Problem 1 Let be a convex pentagon inscribed in a semicircle of diameter . Denote by , , , the feet of the perpendicular...
2011 USAMO Problems真题及答案 完整版真题免费下载 +答案解析请参考文末 Day 1 Problem 1 Let , , be positive real numbers such that . Prove that Problem 2 An integer is assigned to each vertex ...
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