Question

помогите пожалуйстааа

Answer 1

А93 )

$\frac{a \sqrt{a} + b \sqrt{b} }{ \sqrt{a} + \sqrt{b} } + ( {ab})^{ \frac{1}{2} } = \frac{ {( \sqrt{a} })^{2} \sqrt{a} + { (\sqrt{b} )}^{2} \sqrt{b} }{ \sqrt{a} + \sqrt{b} } + \sqrt{ab} = \\ \\ = \frac{ ({ \sqrt{a} })^{3} + { (\sqrt{b}) }^{3} }{ \sqrt{a} + \sqrt{b} } + \sqrt{ab} = \frac{( \sqrt{a} + \sqrt{b})(a - \sqrt{ab} + b )}{ \sqrt{a} + \sqrt{b} } + \sqrt{ab} = \\ \\ = a - \sqrt{ab} + b + \sqrt{ab} = a + b = \frac{19}{4} + 3.25 = 4.75 - 3.25 = 1.5$

А94 )

$\frac{a \sqrt{a} - b \sqrt{b} }{ {a}^{ \frac{1}{2} } - {b}^{ \frac{1}{2} } } - \sqrt{ab} = \frac{ ({ \sqrt{a}) }^{3} - { (\sqrt{b} })^{3} }{ \sqrt{a} - \sqrt{b} } - \sqrt{ab} = \frac{( \sqrt{a} - \sqrt{b} )(a + \sqrt{ab} + b) }{ \sqrt{a} - \sqrt{b} } - \sqrt{ab} = \\ \\ = a + \sqrt{ab} + b - \sqrt{ab} = a + b = \frac{14}{5} + 2.2 = 2.8 + 2.2 = 5$