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
incorrect
8 Superscript StartFraction 3 Over x EndFraction
incorrect
8 Superscript StartFraction x Over 3 EndFraction
correct
8 Superscript 3 x
incorrect