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含参数不等式恒成立问题在高考中频频出现,是高考的重难点之一.由于该类问题综合性强,考查内容广,解法灵活,能力要求高,不少学生面对此类题找不到切入点和突破口.笔者结合实例探讨解决此类问题的策略.一、分离变量法,求参数的取值范围
The problem of constant establishment with parametric inequalities frequently appears in the college entrance examination, which is one of the most difficult points of the college entrance examination. Due to the comprehensive nature of the problems, the content of the examination is wide, the solution is flexible, and the ability requirement is high. Many students cannot find such problems. Cut-in point and breakthrough point. The author discusses the strategy to solve this kind of problem with examples. First, the separation of variable method, the value of the parameter range