待定系数法,是把具有某种确定形式的数学问题,通过引入一些待定的系数转化为两个多项式恒等或方程组的条件来解决,根据“恒等变形”和“形变而值不变”解题,可应用在很多方面.下面列举六例. The undetermined coefficient method is to solve the mathematical problem with a certain form, by introducing some conditions to be determined into the conditions of two polynomial identity or equations, according to the “equal deformation” and “deformation” values. Unchanging " solving problems, can be applied in many ways. The following list of six cases.