Resposta:
[tex]\frac{3}{\sqrt[2]{7}}\\\\\frac{3\sqrt{7}}{\sqrt{7}\sqrt{7}}\\\\\frac{3\sqrt{7}}{7}\\\\\\\frac{1}{\sqrt[2]{2}}\\\\\frac{1\cdot \sqrt{2}}{\sqrt{2}\sqrt{2}}\\\\\frac{\sqrt{2}}{2}\\\\\\\frac{1}{\sqrt[2]{14}}\\\\\frac{1\cdot \sqrt{14}}{\sqrt{14}\sqrt{14}}\\\\\frac{\sqrt{14}}{14}[/tex]
[tex]\frac{7}{\sqrt[2]{12}}\\\\\frac{7}{2\sqrt{3}}\\\\\frac{7\sqrt{3}}{6}[/tex]
