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在中学数学教学中,经常会接触到多种数学方法,比如:配方法、数学归纳法、待定系数法、换元法等方法.每一种方法的应用都是一次数学思维的碰撞.应用得巧妙,可以化繁为简.这些常用方法在很多解题过程中都可以看到其身影.本文以换元法为切入点,来探究这些常用方法在不同知识点中的应用,便于学生去归纳总结这些方法.1换元法基本概念介绍换元法又叫做变量代换法,实质就是转化,通过引入新变量去替换问题中的复杂形式,使问题
In middle school mathematics teaching, there are often many kinds of mathematics methods, such as matching method, mathematical induction method, undetermined coefficient method, change element method, etc. The application of each method is a collision of mathematical thinking. Clever, you can simplify the complex. These common methods can be seen in many problem-solving process. This paper uses the substitution method as an entry point to explore the application of these common methods in different knowledge points, which is convenient for students to generalize. Summarize these methods. 1 The basic concept of the equivalence method The equivalence method is also called the variable substitution method. The essence is the transformation. By introducing new variables to replace the complex forms of the problem, the problem is solved.