[tex]A. \sqrt[3]{5^{3}\cdot2^{6}} = 5\sqrt[3]{2^{6}} = 5\cdot(2^{\frac{1}{3}})^{6} = 5\cdot2^{2}\\\\B. \ \sqrt{7^{2}\cdot11^{6}} = 7\sqrt{11^{6}} = 7\cdot(11^{\frac{1}{2}})^{6} = 7\cdot11^{3}\\\\\underline{C. \ \sqrt{6^{2}+1^{2}} = \sqrt{36+1} = \sqrt{37}\neq 6+1}\\\\D. \ \sqrt[3]{250} =\sqrt[3]{125\cdot2} = \sqrt[3]{5^{3}\cdot2} = 5\sqrt[3]{2}\\\\Odp. \ C.[/tex]
