如何学习“二次根式”

• 作 者: 马霞霞
• 出 处: 山西教育(教学版)
• 发表日期: 2004年20期
• 关键词: 二次根式 数学思想方法 算术根 分母有理化 分类讨论 思维能力 训练方法 训练内容 非负性 知识结构

学习“二次根式”,要把握好本章的学习重点,处理好“二次根式”的概念、性质、运算的关系,要科学地安排训练的内容,提高运算的效率,以更好地培养运算能力。一、熟悉知识结构二、把握“二次根式”性质和数学思想方法(一)性质①(樤a)2=a(a≥0)②樤ab=樤a·樤b(a≥0,b≥0)③a樤b=

To study the “secondary roots”, we must grasp the key points of study in this chapter, handle the relationship between the concepts, nature, and operations of the “secondary roots”. We must scientifically arrange the content of training and improve the efficiency of operations so as to better train operations. ability. First, familiar with the knowledge structure Second, grasp the “secondary root” nature and mathematical thinking and methods (a) the nature of 1 (樤a) 2 = a (a ≥ 0) 2 樤 ab = 樤 a 樤 b (a ≥ 0, b ≥0)3a樤b=