论文部分内容阅读
已知一个不等式(组)的解的情况,求其待定字母的取值范围,是一类思维性较强的问题,近几年,各地的中考试题常出现这一类问题,多数学学生不能快速、准确地求解。下面介绍用数轴来解决这类问题的方法。
Knowing the solution of an inequality (group) and finding the range of the value of its pending letter is a kind of problem with strong thinking. In recent years, this type of problem often appears in the middle school examination questions in various places. Solve quickly and accurately. Here’s how to use a few axes to solve this type of problem.