MQ78 --- Sequence
2013-02-23 8:07 pm
MQ78 --- Sequence Difficulty: 70% Given a_n is a monotonic sequence of positive integers such that the subsequences a_a_n and a_(a_n+1) are both arithmetic sequence. Prove that a_n is an arithmetic sequence
回答 (1)
2013-02-28 4:58 am
✔ 最佳答案
------------------------------------------------------------------------------------------------------圖片參考：http://i1090.photobucket.com/albums/i376/Nelson_Yu/int_zps9c003da2.jpg
收錄日期: 2021-04-13 19:19:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130223000051KK00091