и) \(\frac{3\sqrt{5}}{5\sqrt{2}} = \frac{3\sqrt{5}\sqrt{2}}{5\sqrt{2}\sqrt{2}} = \frac{3\sqrt{10}}{5 \cdot 2} = \frac{3\sqrt{10}}{10}\)
Ответ: \(\frac{3\sqrt{10}}{10}\)