做左a題..唔識做b題=(
(a) Express each of the following as an infinite series.
(i)e = 2+1/2+1/6+1/24+...+1/(r!)+...
(ii)e^(-1) = 1/2-1/6+1/24-...+(-1)^(r)/(r!)+...
圖片參考：http://imgcld.yimg.com/8/n/HA00967484/o/701102090101313873378810.jpg
Answer for (b): 1/2{e+e^(-1)}
M1 Maths Exponential Functions
2011-02-10 12:24 am
回答 (1)
2011-02-10 12:56 am
✔ 最佳答案
As follows:圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/ScreenHunter_03Feb091655.gif
收錄日期: 2021-04-13 17:49:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110209000051KK01013