inequality
回答 (2)
2007-06-17 1:14 am
✔ 最佳答案
solve 4x^3 >x 4x^3>x
i)當x>0,
4x^2>1
x^2>1/4
x>1/2 or x<-1/2(捨棄)
ii)當x<0,
4x^3>x
4x^2<1
x^2<1/4
-1/2< x <1/2
therefore,-1/2 < x < 0
therefore,-1/2 < x < 0 or x > 1/2
2007-06-16 7:10 pm
As follows:
圖片參考：http://i117.photobucket.com/albums/o61/billy_hywung/Jun07/YahooKnowledgeCrazyineq7.jpg
2007-06-21 08:51:22 補充：
唔用 tabulation 可以好似樓下o個位用 case method.無錯, 吾係差人.
圖片參考：http://i117.photobucket.com/albums/o61/billy_hywung/Jun07/YahooKnowledgeCrazyineq7.jpg
2007-06-21 08:51:22 補充：
唔用 tabulation 可以好似樓下o個位用 case method.無錯, 吾係差人.
參考: My Maths knowledge
收錄日期: 2021-04-13 00:49:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070616000051KK00966