math local extrema problem

2012-11-15 2:46 am
Find the local extrema of

f(x)=root(3)cosx + sinx, 0<=x<=2pi

1. why root(3) at x=2pi is local maximum
and root(3) at x=0 is local minimum ?

2. they are not absolute extrema, why they can be local extrema?

3. how to know whether root(3) at x=2pi is local maximum or local minimum ? Can't it be local minimum as the answers are both root(3) ?

please explain

回答 (1)



收錄日期: 2021-04-24 10:53:17
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20121114000051KK00454

檢視 Wayback Machine 備份