求解数学题如果从正面入手不易解决时,人们会想到转化法,而视“常”为“变”,则是令人新奇的思维方法之一.常值换元,往往可以化繁为简,化难为易,取得事半功倍的效果.下面以几例竞赛题为例谈谈如何视“常”为“变”的. Solving Mathematical Problems If you start from the front and do not easily solve, people will think of the conversion method, and regard “regular” as “change”. This is one of the novel ways of thinking. Constant value replacement can often be simplified. It is difficult to make things easier, and the effect of doing more with less is achieved. The following is an example of how to consider “constant” as “changed” with a few examples of contests.