Question

Решите пожалуйста умоляюююю!!!!!!! Срочно!!!!!

Answer 1

$1)\frac{\sqrt{n} }{\sqrt{m}+\sqrt{n}}-\frac{\sqrt{n}-\sqrt{m}}{\sqrt{n}}=\frac{(\sqrt{n})^{2}-\sqrt{mn}+(\sqrt{m})^{2}-(\sqrt{n})^{2}+\sqrt{mn}}{\sqrt{n}(\sqrt{m}+\sqrt{n})} =\frac{m}{\sqrt{n}(\sqrt{m}+\sqrt{n})}\\\\2)\frac{m}{\sqrt{n}(\sqrt{m}+\sqrt{n})}:\frac{\sqrt{m} }{\sqrt{n}}=\frac{m}{\sqrt{n} (\sqrt{m}+\sqrt{n})}*\frac{\sqrt{n} }{\sqrt{m}}=\frac{\sqrt{m} }{\sqrt{m}+\sqrt{n}}$