5. Упростите: а) √36 / √49; б) √72 / √98; в) √4,9 / √3,6; г) √(169/17) / √(25/17).

а) \(\frac{\sqrt{36}}{\sqrt{49}}=\frac{6}{7}\).

б) \(\frac{\sqrt{72}}{\sqrt{98}}=\sqrt{\frac{72}{98}}=\sqrt{\frac{36}{49}}=\frac{6}{7}\).

в) \(\frac{\sqrt{4.9}}{\sqrt{3.6}}=\sqrt{\frac{4.9}{3.6}}=\sqrt{\frac{49}{36}}=\frac{7}{6}\).

г) \(\frac{\sqrt{169/17}}{\sqrt{25/17}}=\sqrt{\frac{169/17}{25/17}}=\sqrt{\frac{169}{25}}=\frac{13}{5}\).

Ответ: а) \(\frac{6}{7}\); б) \(\frac{6}{7}\); в) \(\frac{7}{6}\); г) \(\frac{13}{5}\).