Chủ đề này có 36 trả lời

[Nguyenphuctang]

This is my blogspot.
https://solvingthein...y.blogspot.com/

This is a collection of recent  algebraic inequalities proposed in Math Competion from around a world.

[email protected]

 

[Nguyenphuctang]

http://solvingtheine...og-post_2.html 

$Let \ a, b, c > 0; a^{2}+b^{2}+c^{2}=3.Prove: \\ \sum \frac{a^{3}}{b}+abc\geq 4\\Source: Nguyen \ Phuc \ Tang$

Bài viết đã được chỉnh sửa nội dung bởi Nguyenphuctang: 04-11-2016 - 15:15

[Nguyenphuctang]

http://solvingtheine.../blog-post.html

$Let \ a, b,c > 0;a^{2}+b^{2}+c^{2}=3.Prove: \\ \sum \frac{a^{2}}{2+b+c^{2}}\geq \frac{(a+b+c)^{2}}{12}$ 

Bài viết đã được chỉnh sửa nội dung bởi Nguyenphuctang: 04-11-2016 - 12:04

[Nguyenphuctang]

http://solvingtheine...og-post_81.html

$Let \ a, b, c >0.Prove: \\ \sum \frac{a^{3}}{b^{2}}\geq \frac{(a+b+c)(a^{2}+b^{2}+c^{2})}{ab+bc+ca}$

Bài viết đã được chỉnh sửa nội dung bởi Nguyenphuctang: 04-11-2016 - 12:05

[Nguyenphuctang]

USA MO 2001:

 http://sms.math.nus....Problems/01.pdf
****http://olympiads.hbcse.tifr.res.in/…/previous-question-pape…
http://www.ssmrmh.ro...s-inequality-2/ 
https://lookaside.fb...s-en-ingles.pdf? 
Inequality 2007 over the world:

https://lookaside.fb...-en-ingles.pdf… 

Bài viết đã được chỉnh sửa nội dung bởi Nguyenphuctang: 04-11-2016 - 12:17

[Nguyenphuctang]

Garfunkel inequality

 https://lookaside.fb...DTGarfunkel.pdf? 
http://math.stackexchange.com/ 

It's very famous and hard problem from Garfunkel 

     

[Nguyenphuctang]

Crux Math Magazine (Canada)

http://diendantoanho...tạp-chí-epsil…/

Bài viết đã được chỉnh sửa nội dung bởi Nguyenphuctang: 04-11-2016 - 14:50

[Nguyenphuctang]

http://www.luyenthit...hay-va-loi-giai
vietnamese 

   

[Nguyenphuctang]

Imo and solutions 

Link:

http://db.math.ust.h...resource_03.htm
http://www.artofprob...716f2962_cauch… 

     

[Nguyenphuctang]

 sos :

SOS method : https://ineqkhoinguy....wordpress.com/…/ren-luyen-sos.…
SOS: http://www.mit.edu/~...n/olympiad.html ****
...SOS: https://321da88a-a-6...oglegroups.com/…/2009…

 

 

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Bài viết đã được chỉnh sửa nội dung bởi Nguyenphuctang: 04-11-2016 - 15:36

[Nguyenphuctang]

https://lookaside.fb...fjXyhYXbg47m9DW
 

[Nguyenphuctang]

CHINESE MATH OLYMPIAD:

https://attachment.f...le_download.php…...
Art of : http://www.artofprob...community/c1906

#AoPS 

[Nguyenphuctang]

 Inequality Zhautykov 2006 

http://www.mathlinks...pic.php?t=71330 

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 Inequality Zhautykov 2015

http://www.artofprob...h246429p1353592

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Bài viết đã được chỉnh sửa nội dung bởi Nguyenphuctang: 04-11-2016 - 15:46

[Nguyenphuctang]

✱Crux :

 PDF:

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https://cms.math.ca/...page181-190.pdf 
 AoPS:

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http://www.artofprob...munity/c6h80127 

     

     

     

Bài viết đã được chỉnh sửa nội dung bởi Nguyenphuctang: 04-11-2016 - 15:58

[ThangCaMau]

tks bác Tăng <3 =))

[Nguyenphuctang]

 CHINESE MATH OLYMPIAD:

https://attachment.f...le_download.php…...
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 art of : 

http://www.artofprob...community/c1906

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Bài viết đã được chỉnh sửa nội dung bởi Nguyenphuctang: 04-11-2016 - 22:34

[Nguyenphuctang]

tks bác Tăng <3 =))

Cám ơn bạn! Tôi hi vọng topic này sẽ giúp ích nhiều cho các bạn 

[Nguyenphuctang]

HOJOO LEE : http://2000clicks.com/…/topicsininequalitiesbyhojoolee-2005…

[Nguyenphuctang]

Concours:

file:///C:/Users/user/Downloads/qcm_ch11_en_fili.pdf
canadian society:
https://cms.math.ca/

[Nguyenphuctang]

https://lookaside.fb...IXsA7jR3Cbfuh_r