同学们知道,换元法是中学数学中最为常见的也是基本的数学方法之一.通常情况下,一个数学问题,通过某种换元,不但可以简化问题的表述形式,而且更为容易地透过问题情境,揭示问题本质.因此,面对一个数学问题,增强换元解题意识,正确地使用换元方法,是在解题过程中应当关注的.那么,利用换元法 Students know that the method of changing yuan is one of the most common and basic math methods in high school mathematics.Usually, a mathematical problem can not only simplify the formulation of the problem but also make it easier So as to reveal the essence of the problem through solving the problem situation.Therefore, in the face of a mathematical problem, to enhance the awareness of problem solving and to correctly use the method of changing hands should pay attention to the problem solving process.Then,