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求数列的通项公式,是数列的概念教学中学生感兴趣的问题。在教学中我们看到,许多教学参考书将一些仅仅是看不出排列规律的数列判为没有通项公式。如人民教育出版社出版的高中代数第二册(甲种本)《教学参考书》第40页指出:“数列 89,95,78,90,82写不出它的通项公式。”上海教育出版社出版的《中学基础知识手册·数学》(增订本)第288页指出:“〔注意〕上面的数列(2)100以内的质数从小到大排列起来的数列
The general formula for finding the number of columns is an issue of interest to students in the concept teaching of series. In teaching we see that many teaching reference books will be some just do not see the array of laws as no general formula. As People's Education Publishing House published high school algebra Volume II (Grade A) “Teaching Reference” on page 40 pointed out: “The number 89,95,78,90,82 can not write its general formula.” Shanghai Education Publishing House, “High School Fundamentals Manual · Mathematics” (updated) p. 288 pointed out: "[Note] the above series (2) 100 prime numbers arranged in ascending order