Find $f^{\prime}(x)$ For the Function, Then Find $f^{\prime}(x)$ For the Given $x$
-

Multiple Choice

Find $f^{\prime}(x)$ for the function, then find $f^{\prime}(x)$ for the given $x$ .
- $f(x) =\frac{8}{x^{\prime}}, f^{\prime}(-1)$

A) $f^{\prime}(x) =-\frac{8}{x} ; f^{\prime}(-1) =8$
B) $f^{\prime}(x) =-\frac{8}{x^{2}} ; f^{\prime}(-1) =-8$
C) $f^{\prime}(x) =\frac{8}{x} ; f^{\prime}(-1) =-8$
D) $\mathrm{f}^{\prime}(\mathrm{x}) =\frac{8}{\mathrm{x}^{2}} ; \mathrm{f}^{\prime}(-1) =8$