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一、有关通项公式的问题高考真题1(2010年高考安徽文科卷第5题)设数列{an}的前n项和Sn=n2,则a8的值为A.15B.16C.49D.64参考答案由已知有a8=S8-S7=64-49=15.选A.
First, the formula for the problem of the general entrance examination Zhenti 1 (2010 Anhui University entrance examination papers Volume 5) set the number of columns {an} n and Sn = n2, the value of a8 A.15B.16C.49D.64 Reference answer is known by a8 = S8-S7 = 64-49 = 15.