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stephen38
03-09-2008, 09:29 PM
Hi,i am a new user from indonesia..
I wonder whether this is the right place to post ineq problems, but here it goes..

Prove that $a,b,c$ are positive reals st a+b+c=3 then
\sum \frac{1}{5a^2-4a+11} \le \frac{1}{4}...

quantaida
04-09-2008, 10:53 AM
it's here [Only registered and activated users can see links]

sunday
07-09-2008, 06:26 PM
Bác quantaida viết english jỏi ghê.có quyển sách nào hay bán cho em với