学习了一元一次不等式和一元一次不等式组以后,我们除了会遇到求解集、用不等式(组)解决实际问题这些题目外,还会遇到已知不等式或不等式组的解集来求参数的值(范围)的问题,这类问题对思维有较高的要求.为方便同学们学习,让大家及时掌握求解的方法和策略,现举例说明. After learning one inequality inequality and one inequality inequality group, we will encounter the solution set and use inequality (group) to solve practical problems. We will also encounter the solution set of the known inequality or inequality group to find the value of the parameter. (Scope) problem, this type of problem has a higher demand for thinking. In order to facilitate the students to learn, let everyone master the solution method and strategy in time.