解题者在面对数学问题时,如果直接应用已有的知识、方法和经验不能或不易解决该问题,往往会将需要解决的问题加以转化,把它归结为能够解决或比较容易解决的问题,最终使原问题得以解决.这种思想方法称为转化(也称化归).转化就是将未知的、陌生的、复杂的问题通过不断转化,变为已知的、熟悉的、简单的问题,从而使问题顺利解决.转化无处不在, Solvers in the face of mathematical problems, if the direct application of existing knowledge, methods and experience can not be or difficult to solve the problem, often the problem to be solved to be transformed into it can be solved or easier to solve the problem , Finally solve the original problem.This method of thinking called transformation (also known as the return.) Transformation is the unknown, strange, complex problems through continuous conversion, known, familiar, simple problem , So that the problem can be solved smoothly.Transformation is everywhere,