理科第 ( 2 2 )题是继去年第 ( 1 9)题后的又一道难得的优秀函数综合题 ,它有如下特点 :第一 ,形式简洁明了 .本题用文字语言和符号语言简洁明了地给出了已知条件和问题 .第二 ,内涵丰富隽永 .从内容上看 ,本题涉及函数的对称性 (包括奇偶性 )、周期性 ,数列和数列的极限等基本 The Science (22) title is another rare and outstanding function synthesis question after the (19) question last year. It has the following characteristics: First, the form is concise and clear. This topic is written in a concise and clear language and symbolic language. There are known conditions and problems. Second, the content is rich and meaningful. From the content point of view, this topic deals with the symmetry of functions (including parity), periodicity, the limit of series and series, etc.