数列和不等式都是高中数学的重要内容,这两个重点知识的联袂、交汇融合,更能考查学生对知识的综合理解与运用的能力.这类交汇题充分体现了“以能力立意”的高考命题指导思想和“在知识网络交汇处”设计试题的命题原 Both series and inequality are important contents of high school mathematics, and the two key knowledge are combined, converged and integrated, so that students’ ability to comprehensively understand and use knowledge can be examined. Such confluence fully embodies the concept of “ The college entrance examination proposition guidelines and ”knowledge network interchange " proposition of the original design questions