数列是高考必考的重要题型,每年都有一个大题。数列递推通项公式是近几年高考的热点内容也是难点内容。利用递推求通项公式具有很强的逻辑性,是考查逻辑推理和化归能力的好素材,既可考查等价转化与化归这一数学思想,又可考查观察、分析、推理能力。致使很多考生在求解数列问题中失分较多,特 The number of columns is an important test of the college entrance examination questions, every year, a big problem. Recursion sequence formula is the hot topic in recent years college entrance examination is also difficult content. The use of recursion formula has a strong logic, is to examine the logical reasoning and ability to change good material, both to test the equivalent conversion and return to the mathematical thinking, but also examine the observation, analysis, reasoning ability. As a result, many candidates lose more points in solving series problems