将一个式子中的某一项或某一项中的某个因式进行放大或缩小(——不等替换),使其中向着结论倾斜变换,我们称之为放缩法。放缩法可以说是所有数学方法中最灵活的一种,因为它不受公式、法则、定理的严格限制,没有固定的模式可套,全靠解题者临场因“式”而行,相机而动。放缩法应用也相当广泛、代数、几何、三角无处不有,平时练习、竞赛考试无时不用, 下面就放缩法在多方面、多层次的应用举例说明。 一、放缩法在根式中的应用 根式运算是代数运算中较难的一种,如 To zoom in or out (or not to replace) a factor in an item or item in a formula so that it is tilted toward the conclusion, which we call the deflation method. Scaling can be said to be the most flexible of all mathematical methods because it is not strictly limited by formulas, rules, and theorems. There is no fixed set of modes, and it is entirely due to the presence of the solver. And moving. The application of the shrinking method is also quite extensive. Algebra, geometry, and triangles are everywhere. There are times when practicing and contest examinations are used at any time. Here is an example of the multiplication and multi-level application of the shrinking method. First, the application of the deflation method in the root type The root type operation is a difficult one in algebraic operations, such as