#### Answer

$\frac{\sqrt 2}{7}$

#### Work Step by Step

The quotient rule holds that $\sqrt[n] (\frac{a}{b})=\frac{\sqrt[n] a}{\sqrt[n] b}$ (where $\sqrt[n] a$ and $\sqrt[n] b$ are real numbers and $\sqrt[n] b$ is nonzero).
Therefore, $\sqrt (\frac{2}{49})=\frac{\sqrt 2}{\sqrt 49}=\frac{\sqrt 2}{7}$
We know that $\sqrt 49=7$, because $7^{2}=49$.