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goodgirla1city

$A=\frac{a\sqrt{b}+b\sqrt{a}}{\sqrt{ab}}: \frac{2}{\sqrt{ab}}$

$=\frac{\sqrt{ab}(\sqrt{a}+\sqrt{b})}{\sqrt{ab}}. \frac{\sqrt{ab}}{2}$

$=\frac{\sqrt{ab}(\sqrt{a}+\sqrt{b})}{2}$ :)
 
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