http://upload.lsforum.net/users/public/d7969Untitleds184.jpg
why this question dont have to consider both x>2 and x <-2 ??
just consider x>2 ???
integration
2013-03-10 6:45 am
回答 (1)
2013-03-13 5:48 am
✔ 最佳答案
The solution set x = 2secθAs secθ = 1/cosθ and -1 <= cosθ <= 1
The range of x is x > 2 or x < -2
收錄日期: 2021-04-27 17:43:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130309000051KK00412