近年来的高考试题中,多次涉及由递推关系式所给出的数列.对此,报刊上已有不少文章加以论述。而问题的另一面,在研究某些数学题时,往往先要根据题设、构造出递推关系式,然后再来解决问题。本文将通过下面几例,对此作一介绍. In recent years, among the high-examination questions, there have been many references to the series given by the recursive relation. In this regard, many articles have been discussed in the press. On the other side of the question, when studying certain mathematics questions, it is often necessary to first construct the recurrence relation according to the title and then solve the problem. This article will introduce the following examples.