1,Tìm x,y,z biết a+b+c = 0
\sqrt{x-a}+ \sqrt{y-b}+ \sqrt{z-c} = \frac{1}{2}(x+y+z)
2, CMR:
a+b+\frac{1}{2}\geq \sqrt{a}+ \sqrt{b}
3,
a, Cho a >0 . CMR : a+\frac{1}{2}\geq 2
b, Cho a\geq 0 , b\geq 0 CMR \sqrt{\frac{a+b}{2}}= \frac{\sqrt{a}+\sqrt{b}}{2}
c, Cho a,b > 0 CMR \sqrt{a}+\sqrt{b}...