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Cho a, b, c dương thoả mãn[TEX]a\geq b,a\geq c[/TEX]. Tìm min
[TEX]\frac{a}{b}+2\sqrt{1+\frac{b}{c}}+3\sqrt[3]{1+\frac{c}{a}}[/TEX]
[TEX]\frac{a}{b}+2\sqrt{1+\frac{b}{c}}+3\sqrt[3]{1+\frac{c}{a}}[/TEX]