数列可以看成以正整数集(或其子集)为定义域的函数af(n)n,当自变量n按从小到大的顺序依次取值时,f(n)所对应的一列数.本文引导学生运用图形计算器,对《数列的周期及简单应用》进行了研究性学习. The sequence can be regarded as a function af (n) n which takes a set of positive integers (or a subset thereof) as a domain, and f (n) corresponds to a column number when the argument n sequentially takes values ​​from small to large. This article guides students to use graph calculators to study the “sequences of cycles and simple applications.”