A
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Cho [tex]\frac{1}{a^2} + \frac{1}{b^2} + \frac{1}{c^2} [/tex] = 1 (với a,b,c # 0)
Tìm GTNN :
S=[tex]\frac{1}{\sqrt[2]{5}a^2+2ab+b^2}+\frac{1}{\sqrt[2]{5}b^2+bc+c^2}+\frac{1}{\sqrt[2]{5}c^2+2ac+a^2}[/tex]
Tìm GTNN :
S=[tex]\frac{1}{\sqrt[2]{5}a^2+2ab+b^2}+\frac{1}{\sqrt[2]{5}b^2+bc+c^2}+\frac{1}{\sqrt[2]{5}c^2+2ac+a^2}[/tex]
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