求参数范围问题是高考的一大热点,常考常新.这类问题涉及的知识点多面广,易于考察学生综合运用方程、函数、不等式等基础知识的能力,而且方法灵活,有一定的技巧,是教学中的难点.二次函数是中学数学的重点内容,涉及它的问题历史受到出题者的青睐.本文讨论二次不等式中的参数范围 The problem of finding the range of parameters is a major hot spot of the college entrance examination. Chang often tests new ones. The knowledge points involved in this type of issue are multifaceted, easy to examine students’ ability to comprehensively use basic knowledge such as equations, functions, and inequalities, and they are flexible and have certain skills. , is a difficult point in teaching. The quadratic function is the key content of middle school mathematics, and the problem history involving it is favored by the issuers. This paper discusses the parameter range in quadratic inequality.