Simplify the given expression as shown below
[tex]\begin{gathered} x^4=8 \\ \Rightarrow(x^4)^{\frac{1}{4}}=8^{\frac{1}{4}} \\ \Rightarrow x^{\frac{4}{4}}=8^{\frac{1}{4}} \\ \Rightarrow x=8^{\frac{1}{4}} \end{gathered}[/tex]
Thus, the answer is 8^(1/4), option D.
