GTLN
Chứng minh: $2\sqrt{ab+bc+ca}\leq \sqrt{3}.\sqrt[3]{(a+b)(b+c)(c+a)}$
; $a,b,c\geq 0$
GTLN, GTNN
GTLN
Chứng minh: $2\sqrt{ab+bc+ca}\leq \sqrt{3}.\sqrt[3]{(a+b)(b+c)(c+a)}$
GTLN, GTNN
GTLN
Chứng minh: $2\sqrt{ab+bc+ca}\leq \sqrt{3}.\sqrt[3]{(a+b)(b+c)(c+a)}$
; $a,b,c\geq 0$
GTLN, GTNN