数列是高中数学中的一个重要知识点,探究的就是其中的固有规律和问题,以此找到其通项,来探索未知的数项和公式.其基本的规律就是数列定义中所提到的,数列的第n项与项数n之间的函数关系式用一个基本的通项公式an=f(n)来表示,像在常数列中就是an=n,n作为常数就是一个通用的公式,还有呈等差或等比递增或递减的数列,都可以用相关的公式来表示,作为一个通项,这些通项在应用题中的运用,就是来解决实际问题的. The sequence is an important knowledge point in high school mathematics, and its inherent laws and problems are explored in order to find its general terms, to explore unknown numbers and formulas.The basic law is mentioned in the definition of series, The function between the nth item of the series and the number of terms n is represented by a basic general term an = f (n). Like an = n in a constant column, n is a universal formula as a constant, There are numbers showing equal or even increases or decreases in numbers, which can all be expressed in terms of related formulas. As a general rule, the use of these general items in the application of questions is to solve practical problems.