分类讨论思想是一种常见的数学解题思想,常应用于数列,函数与导数有关的考题中.既然分类,就应有分类标准与依据,若能合理进行,则会起到事半功倍之效,不然,则会陷入讨论困境.本文就数列解题中涉及的分类讨论思想进行归纳整理,得到常见的三种分类题型.类型一、按项数奇偶进行分类例1(人教B版教材必修5习题)在数 Classification thinking is a common thought of mathematical problem solving, often applied to the sequence, function and derivative of the test questions. Since the classification, there should be classification criteria and basis, if it can be reasonably done, will play a multiplier effect, Otherwise, it will fall into the discussion of the dilemma.This article discusses the classification of the sequence of questions to discuss the idea of ​​induction finishing, the common three kinds of classification questions. Type one, according to the number of items to classify Case 1 5 exercises) in the number