已知一元二次不等式的解集中有一个或几个整数,求某个参数的取值范围,这是不等式中常见的基本问题,也是难点之一.如何突破难点,抓住关键,找到最佳的解题途径,本文将对此做一些归类分析.一、解区间有一个端点是常数如果不等式的解区间的一个端点是常数,另一个端点含有参数,那么只要在数轴上滑动这个含有参数的端点,观察滑动过程中哪些位置满足 It is known that there is one or several integers in the solution of univariate quadratic inequality, and it is a common problem in the inequality that one of the difficult points is to find the range of the value of a certain parameter. It is also one of the difficulties to break through the difficulties, grasp the key and find the best Of the problem-solving approach, this article will do some classification analysis.A solution interval has an endpoint is a constant If the inequality of the solution interval one endpoint is a constant, the other endpoint contains parameters, so long as the slide in the number of parameters containing the axis End point, observe the sliding process which position to meet