通过分析典型例题,总结和归纳教学实践中学生因对等差数列基础概念和性质掌握不牢固,而导致的对等差数列相关问题的错误分析和推导,并积极提出改进方法. By analyzing the typical examples, the paper summarizes and summarizes the error analysis and deduction of the related problems caused by the relative differences between the students in the teaching practice due to the weak foundation of the basic concepts and nature of the pairs of opposite difference, and puts forward the improving methods actively.