Respuesta :

"cubed root of x squared" is "(cubed root of x) squared" = "cubed root of (x squared)" 
(x^2)^(1/3) = x^(2 * 1/3) = (x^(1/3) )^2  

So the exponent or power os 2/3.

Thales
Roots take a fractional form, so the 8th root as a power is 1/8. The indices would multiply so:

x^3/8.
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