http://hk.myblog.yahoo.com/sneeay/article?new=1&mid=45
How to do? Thanks.
AL Pure Maths (AM > GM)
2009-10-29 12:37 am
回答 (2)
2009-10-29 1:00 am
✔ 最佳答案
BY AM>HM (A1≠A2)(1+1/2+1/3+....+1/2n)/2n > 2n/1+2+3+...+2n
1+1/2+1/3+...+1/2n>2n/[2n(1+2n)/2]=4n/(1+2n)
∴1+1/2+1/3+....+1/2n>4n/(1+2n)
2009-10-28 17:01:12 補充：
e家明唔明啊?
參考: KCSS REGINALD
2009-10-29 3:34 am
HM 唔係OUT C 咩
收錄日期: 2021-04-23 22:11:38
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091028000051KK00728