For this case we have to, by defining properties of powers and roots the following is fulfilled:
![\sqrt [n] {a ^ m} = a ^ {\frac {m} {n}}](https://img.qammunity.org/2020/formulas/mathematics/high-school/suo6ai2uezolc3t7f2f9e9h1lijquf271f.png)
We must rewrite the following expression:
![\sqrt [3] {8 ^ {\frac {1} {4} x}}](https://img.qammunity.org/2020/formulas/mathematics/high-school/xnkp0bqpe2slj7i0tp966xjj5k6j3gvlok.png)
Applying the property listed we have:
![\sqrt [3] {8 ^ {\frac {1} {4} x}} = 8 ^ {\frac{\frac {1} {4} x} {3} }= 8 ^ {\frac {1} {4 * 3} x} = 8 ^ {\frac {1} {12} x}](https://img.qammunity.org/2020/formulas/mathematics/high-school/394upgmict236g90qbw7oci76i5j63q3ky.png)
Using the property again we have to:
![8 ^ {\frac {1} {12} x} = \sqrt [12] {8 ^ x}](https://img.qammunity.org/2020/formulas/mathematics/high-school/xp0n35ivubqn7gbw1jyj5srjsl8t1jdhdt.png)
Thus, the correct option is option C
Answer:
Option C