Question

va rog frumos sa ma ajutați,dau coroana!!​

Answer 1

Răspuns:

$a) \sqrt{1 + \frac{5}{4} } \div \frac{9}{8} = \sqrt{ \frac{4 + 5}{4} } \div \frac{9}{8} = \sqrt{ \frac{9}{4} } \times \frac{8}{9} = \frac{3}{2} \times \frac{8}{9} = \frac{4}{3} \\ b) \frac{5}{8} \div \sqrt{9 - \frac{11}{4} } = \frac{5}{8} \div \sqrt{ \frac{36 - 11}{4} } = \frac{5}{8} \div \sqrt{ \frac{25}{4} } = \frac{5}{8} \times \frac{2}{5} = \frac{1}{4} \\ c) \frac{5}{6} \div \sqrt{2 + \frac{7}{9} } = \frac{5}{6} \div \sqrt{ \frac{18 + 7}{9} } = \frac{5}{6} \div \sqrt{ \frac{25}{9} } = \frac{5}{6 } \times \frac{3}{5} = \frac{1}{2}$