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众所周知,圆锥曲线在高中数学中占有重要的地位,是历届高考的重点内容之一.其中,圆锥曲线下参数(目标式子)范围的求解,将几何、函数、不等式等知识点有机地结合在一起,很好地体现了在知识网络交汇处命题的理念,有效地考查了学生分析、应用综合知识解决问题的能力,以及对解析几何、函数、不等式等基础知识、基本技能与基本数学思想方法的掌握情况,因此倍受高考命题者的青睐.求解该类问题,不等式的构建是关键,也是难点.下面笔者结合自己多年的教学经验,邀
As we all know, the conic section occupies an important position in high school mathematics, and is one of the key contents of the previous college entrance examination. Among them, the solution of the parameter (objective) range under the conic curve combines the knowledge points of geometry, function, inequality, etc. organically. Together, it embodies the concept of propositions at the intersection of knowledge networks and effectively examines students’ abilities to analyze and apply comprehensive knowledge to solve problems, as well as basic knowledge, basic skills, and basic mathematics thinking methods such as analytical geometry, functions, and inequalities. The mastery of the situation, so much favored by the college entrance examination proposition. Solving this type of problem, inequality construction is the key, but also difficult. The following author combined his many years of teaching experience, invited