For this case, we must simplify the following expression:
![\sqrt [8] {x ^ 2y ^ 6}](https://img.qammunity.org/2020/formulas/mathematics/high-school/f931jngblustek5qaflvb4e6kxhkx4unyp.png)
By properties of powers and roots we have to:
![\sqrt [n] {a ^ m}](https://img.qammunity.org/2020/formulas/mathematics/high-school/wbjlx0yk7pbhua5frqzq59tr1gykkniyo1.png)
It can be written equivalently as:

Then, the previous expression can be written as:

Simplifying we have:

Returning to the radical form we have:
![\sqrt [4] {xy ^ 3}](https://img.qammunity.org/2020/formulas/mathematics/high-school/agd0o8t7j7uxryqwffiwtsxqig4eysipdq.png)
Answer:
![\sqrt [4] {xy ^ 3}](https://img.qammunity.org/2020/formulas/mathematics/high-school/agd0o8t7j7uxryqwffiwtsxqig4eysipdq.png)