For this case, we must simplify the following expression:
[tex]\sqrt [8] {x ^ 2y ^ 6}[/tex]
By properties of powers and roots we have to:
[tex]\sqrt [n] {a ^ m}[/tex]
It can be written equivalently as:
[tex]a ^ {\frac {m} {n}}[/tex]
Then, the previous expression can be written as:
[tex]x ^ {\frac {2} {8}} y ^ {\frac {6} {8}}[/tex]
Simplifying we have:
[tex]x ^ {\frac {1} {4}} y ^ {\frac {3} {4}}[/tex]
Returning to the radical form we have:
[tex]\sqrt [4] {xy ^ 3}[/tex]
Answer:
[tex]\sqrt [4] {xy ^ 3}[/tex]