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待定系数法,是把具有某种特定形式的数学问题,引入一些待定系数来表示结果,通过变形转化为两个多项式恒等或方程组来解决的数学方法叫待定系数法,现举例说明.一、求函数的解析式例1已知f(x)是一次函数,且f{f[f
To be determined coefficient method, is to have a particular form of mathematical problems, the introduction of some undetermined coefficients to represent the results, through the transformation into two polynomial equations of identity or equations to solve the mathematical method called undetermined coefficient method, is an example. , Find the function of the analytical formula 1 known f (x) is a linear function, and f {f [f