数列的递推关系是指数列中的前一项(前几项)与后一项的关系式.递推数列是数列中的重要内容,通过递推关系,观察,探求数列的规律,进而可求出整个数列的通项公式.通过递推关系的学习,可以培养学生的观察能力,归纳与转化能力,综合运用知识等能力,因此,是近几年高考与竞赛的热点. The recurrence relation of a series is the relation between the former (first) and the latter one of the index column. The recursive sequence is an important part of the sequence. Through the recurrence relationship, observe and explore the law of the sequence, and then Find the general formula of the whole series. Through the study of recurrence relations, students can develop their observation ability, induction and transformation ability, and the ability to use knowledge comprehensively. Therefore, it is a hot spot of college entrance examination and competition in recent years.