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NTPS2CBC

NTPS2CBC

Đăng ký: 30-12-2012
Offline Đăng nhập: 05-03-2017 - 17:33
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$\sum \frac{(a+b)^{2}}{a^{2}+bc}...

08-12-2013 - 22:24

Cho $a,b,c \geq 0$, cm: $\sum \frac{(a+b)^{2}}{a^{2}+bc}\geq 6$


$\sum \sqrt{a^{2}+\frac{1}{b+c}...

08-12-2013 - 11:52

Cho $a,b,c>0, a+b+c=6$, Cm:

$\sum \sqrt{a^{2}+\frac{1}{b+c}}\geq \frac{3\sqrt{17}}{2}$

 


$\sum \frac{a+b}{a+7b+c}\geq \frac{2...

05-12-2013 - 12:02

$a,b,c>0$, CM:

$\sum \frac{a+b}{a+7b+c}\geq \frac{2}{3}$


$\sum \sqrt{\frac{a+b}{2}-ab}\ge...

04-12-2013 - 20:57

Cho $a+b+c=2$ và $a,b,c>0$. CMR:

$\sum \sqrt{\frac{a+b}{2}-ab}\geq \sqrt{2}$