Answer: x^(3/8)
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Explanation:
The rule we use is
[tex]\Large \sqrt[n]{x^m} = x^{m/n}[/tex]
This allows us to go from root form to exponent form, and vice versa.
The index of the root is the denominator of the fractional exponent.
In this case, m = 3 and n = 8, so,
[tex]\Large \sqrt[8]{x^3} = x^{3/8}[/tex]
