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2011年北大保送生考试于2010年12月25日进行,其中数学部分难度接近竞赛难度.共5道试题,其中第2题难度最大.下面笔者对这5道试题作一简单评解.
2011 Peking University exams on December 25, 2010, of which the mathematical part of the degree of difficulty is close to the difficulty of the contest. A total of 5 questions, of which the second is the most difficult questions. The author of the following five questions for a simple comment.