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不等式是高中数学的重点内容,是高考数学的热点,如不等关系的证明、恒成立(存在性)等问题都备受命题者的青睐,这些问题既涉及到函数、导数、不等式等重点知识,又涉及到构造函数、分离参变量等重要方法;它们既能考查学生的基本知识、方法的掌握情况,又能考查学生灵活解决问题的能力,因此这些问题是高考数学的高频考点.本文拟从具体的实例出发,就处理不等式的两个
Inequality is the key content of high school mathematics, which is the hot spot of mathematics in college entrance examination, such as the proof of unequal relationship, constant establishment (existential) and other issues are favored by the propositional people, which involve not only the key knowledge of functions, derivatives and inequality , But also involves the constructor, the separation of variables and other important methods; they can not only examine the students ’basic knowledge, methods to grasp the situation, but also examine the students’ ability to solve the problem flexibly, so these questions are the high-frequency test centers. Starting from a concrete example, we will deal with two inequalities