函数f(x)=(ax+b)/(cx+d)的迭代(英文)

On the Iteration of the Function f(x)■

本文通过函数f（x）=■定义了一个函数列入fn（x）n｝n∈N，并讨论了｛fn（x）｝n∈N的解析表示和周期性．

In this paper, a function sequence {fn(x)n}n∈N generated by the function f(x)is discussed. The representation andperiodicity of {fn(x)n}n∈N are given.