Biết $a^2+b^2+c^2=2ab+2bc+2ca$. Tìm GTNN của
$P= a+b+c+\frac{1}{abc}-\frac{9}{a+b+c}$
Edited by Viet Hoang 99, 29-10-2014 - 20:14.
$P= a+b+c+\frac{1}{abc}-\frac{9}{a+b+c}$
Started By tranvanhuan, 28-10-2014 - 21:05
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users
