将课本例习题进行有效的“组合”及“拓展”,挖掘隐含在问题内部的研究性材料进行探索与开发,既能让学生真正掌握所涉及内容又有利于其探究能力的培养,也是提高教师处理教材能力的有效途径.人教版高中教材第一册(上)(必修)P128例4及P129习题3.5第7题:1)已知Sn是等比数列{an}的 The effective “combination” and “expansion” of textbook example exercises, and the exploration and development of research materials hidden within the problem, will not only enable students to truly grasp the content involved, but also contribute to the development of their inquiry ability, as well as improvement. An effective way for teachers to deal with teaching materials. PEP High School Text Book 1 (top) (required) P128 Case 4 and P129 Problem Set 3.5 Problem 7: 1) Sn is known to be an array of {an}