a,b,c>0 $\displaystyle \frac{a}{\sqrt{4b^{2}+bc+4c^{2}}}+\frac{b}{\sqrt{4 c^{2}+ca+4a^{2}}}+\frac{c}{\sqrt{4a^{2}+ab+4b^{2}} }\geq 1$
Follow Math Help Forum on Facebook and Google+
View Tag Cloud