- Thread starter
- #1
Albert
Well-known member
- Jan 25, 2013
- 1,225
a,b,c,d > 0 , please prove :
$ \sqrt{a+b+c+d} \geq \dfrac{\sqrt{a}+\sqrt{b}+\sqrt{c}+\sqrt{d}}{2}$
$ \sqrt{a+b+c+d} \geq \dfrac{\sqrt{a}+\sqrt{b}+\sqrt{c}+\sqrt{d}}{2}$
Last edited by a moderator: