For this case we have the following expression:
[tex]4 ^ {\frac {3} {8}}[/tex]
By definition of properties of powers and roots we have to:
[tex]a ^ {\frac {m} {n}} = \sqrt [n] {a ^ m}[/tex]
Then, we can rewrite the expression as:
[tex]\sqrt [8] {4 ^ 3}[/tex]
Answer:
[tex]4 ^ {\frac {3} {8}} = \sqrt [8] {4 ^ 3}[/tex]
