Answer
$$\frac{1}{11^{\frac{2}{5}}}$$
Work Step by Step
In order to solve this problem, we must use the rules of rational exponents, which are listed on page 420. Doing this, we find that the expression simplifies to:
$$11^{\frac{2}{5}-\frac{4}{5}} \\ \frac{1}{11^{\frac{2}{5}}}$$