GTLN
Cho $a^{2}+b^{2}=c^{2}+d^{2}=5$. CM:$\sqrt{5-a-2b}+\sqrt{5-c-2d}+\sqrt{5-ac-bd}\leq \frac{3\sqrt{30}}{2}
.$
GTLN, GTNN
GTLN
Cho $a^{2}+b^{2}=c^{2}+d^{2}=5$. CM:$\sqrt{5-a-2b}+\sqrt{5-c-2d}+\sqrt{5-ac-bd}\leq \frac{3\sqrt{30}}{2}$
GTLN, GTNN
GTLN
Cho $a^{2}+b^{2}=c^{2}+d^{2}=5$. CM:$\sqrt{5-a-2b}+\sqrt{5-c-2d}+\sqrt{5-ac-bd}\leq \frac{3\sqrt{30}}{2}
.$
GTLN, GTNN