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二次根式既是中考的必考内容,又是初中数学的重点内容之一,比较二次根式的大小在各类考试中经常出现,是中考和各类数学竞赛的常见题型.这类问题,涉及的知识面广,技巧性强.因此,比较二次根式的大小除了熟练掌握二次根式的基本性质和运算法则外,还要根据问题的具体结构特征,多角度地思考,灵活选用不同的思维方法.为帮助同学们解决这类问题,本文向大家介绍比较二次根式大小常见的几种方法,对同学们的学习有很大的帮助和促进作用.
The secondary root is not only the necessary content of the entrance exam, but also one of the key contents of junior high school mathematics, the size of the secondary root often appears in all kinds of exams, is a common test in the middle school entrance exam and various types of mathematics competition.This kind of problem, Therefore, compared with the basic nature of quadratic root and the algorithm, it is also necessary to think in terms of the specific structural features of the problem and think more flexibly from different perspectives Thinking method.In order to help students to solve such problems, this article introduces several ways to compare the size of the secondary root, which is of great help and promotion for the students to learn.