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\(x+y\ge\sqrt[3]{xy}\left(\sqrt[3]{x}+\sqrt[3]{y}\right)\Rightarrow x+y+1\ge\sqrt[3]{xy}\left(\sqrt[3]{x}+\sqrt[3]{y}+\sqrt[3]{z}\right)\)
ban lm tip nha
\(x+y\ge\sqrt[3]{xy}\left(\sqrt[3]{x}+\sqrt[3]{y}\right)\Rightarrow x+y+1\ge\sqrt[3]{xy}\left(\sqrt[3]{x}+\sqrt[3]{y}+\sqrt[3]{z}\right)\)
ban lm tip nha
