cho a,b,c không âm thỏa ab+bc+ac=3.Chứng minh rằng:
$\frac{1}{a^{2}+1}+\frac{1}{b^{2}+1}+\frac{1}{c^{2}+1}$
tìm Max
Started By fcb, 15-04-2014 - 20:47
-
This topic is locked
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users
