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problema inegalitate.

 
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Dan02



Joined: 10 Jan 2017
Posts: 1

PostPosted: Tue Jan 10, 2017 6:15 pm    Post subject: problema inegalitate. Reply with quote

Buna seara,ma puteti ajuta cu urmatoarea inegalitate?

 \text{Daca a,b,c>0 si a+b+c=1,demonstrati:}\\
\sum \frac{a}{a^2+1}\leq \frac{9}{10}
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Marius Mainea
Gauss


Joined: 26 May 2008
Posts: 1099
Location: Gaesti (Dambovita)

PostPosted: Sat Jan 28, 2017 12:28 am    Post subject: Reply with quote

Foloseste ca a^2\ge\frac{2a}{3}-\frac{1}{9}
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