Odpowiedź:
a) [tex]\frac{2}{3\sqrt{7}} = \frac{2*\sqrt{7}}{3\sqrt{7}*\sqrt{7}} = \frac{2\sqrt{7}}{3*7} = \frac{2\sqrt{7}}{21}[/tex]
b) [tex]\frac{2\sqrt{2}}{\sqrt{5}} = \frac{2\sqrt{2} * \sqrt{5}}{\sqrt{5}*\sqrt{5}} = \frac{2\sqrt{10}}{5}[/tex]
c) [tex]\frac{7}{4\sqrt{3}} = \frac{7*\sqrt{3}}{4\sqrt{3}*\sqrt{3}} = \frac{7\sqrt{3}}{4*3} = \frac{7\sqrt{3}}{12}[/tex]
d) [tex]\frac{\sqrt{11}}{2\sqrt{13}} = \frac{\sqrt{11}*\sqrt{13}}{2\sqrt{13}*\sqrt{13}} = \frac{\sqrt{143}}{2 * 13} = \frac{\sqrt{143}}{26}[/tex]
