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纵观近年全国各省市高考摸拟试题,与方程(组)有关的概率问题频频出现,它们构思精巧,新颖别致,极富思考性和挑战性,是考查学生素养和能力的极好素材.下面精选出8道典型例题并予以分类导析,旨在探索题型规律,揭示解题方法.1与一元二次方程有关的概率问题例1在一元二次方程x2-2ax+
Looking at the examination questions of the college entrance examinations in various provinces and cities in recent years, the probability problems related to equations (groups) frequently appear. They are concise, novel, unique, highly reflective and challenging, and are excellent materials for examining students’ accomplishments and abilities. Eight typical examples are selected and classified and analyzed. The purpose is to explore the law of the questions and reveal the method of solving the questions. 1 Probability problems related to the unary quadratic equation Example 1 The quadratic equation x2-2ax+