构造法是常用的解题方法 ,它通过对条件和结论的分析 ,构造辅助元素 ,如函数、图形、不等式、方程 (组 )、复数、数列等 ,架起一座连接条件和结构的桥梁 ,从而使问题得以解决 .运用构造法解题 ,可以使各种数学知识互相渗透 ,能起到优化解题的效果 .对于有些问题 ,也可以构造概 The construction method is a commonly used problem solving method. It constructs auxiliary elements such as functions, graphs, inequalities, equations (groups), complex numbers, sequences, etc. by analyzing the conditions and conclusions, and erects a bridge connecting the conditions and structure. Solve the problem. The use of construction method to solve problems, can make all kinds of mathematics knowledge penetrate each other, can play a role in optimizing the problem solving. For some problems, it can also be constructed.