Turunan Fungsi Aljabar

\begin{equation*}
\begin{split}
f(x) & = \frac {1}{x^5} \\\\
f(x) & = x^{-5} \\\\
f'(x) & = -5 \:.\: x^{-5 - 1} \\\\
f'(x) & = -5 \:.\: x^{-6} \\\\
f'(x) & = - \frac {1}{x^6}
\end{split}
\end{equation*}