Answer:
Option 3: 8 Superscript StartFraction x Over 3 EndFraction 
Explanation:
RootIndex 3 StartRoot 8 EndRoot Superscript x 
- ∛8ˣ = 
  
Options:
RootIndex x StartRoot 8 EndRoot Superscript x 
 ![(\sqrt[x]{8})^x](https://img.qammunity.org/2021/formulas/mathematics/high-school/yovk5xty2l5p7cs8n9ayc44arjlw750bmt.png) incorrect incorrect
8 Superscript StartFraction 3 Over x EndFraction 
  incorrect incorrect
8 Superscript StartFraction x Over 3 EndFraction 
  correct correct
8 Superscript 3 x
  incorrect incorrect