Find the Derivative $\mathrm{f}(\mathrm{x})=4(\sqrt[8]{\mathrm{x}}) ;(\mathrm{x}>0)$ A) $\frac{1}{2} x-7 / 8$ B) $\frac{1}{2} x^{9 / 8}$

Multiple Choice

Find the derivative.
- $\mathrm{f}(\mathrm{x}) =4(\sqrt[8]{\mathrm{x}}) ;(\mathrm{x}>0)$

A) $\frac{1}{2} x-7 / 8$
B) $\frac{1}{2} x^{9 / 8}$
C) $-\frac{9}{2} x-9 / 8$
D) $28(\sqrt[7]{x})$