Find $f \circ g$ and $g \circ f$.
\begin{equation*} f(x) = \frac{6}{x^2 - 1}, \quad g(x) = x + 1 \end{equation*}
(a) $f \circ g$
\begin{equation*} \frac{6}{x + 2x} \end{equation*}
(b) $g \circ f$
Find the domain of each function and each composite function. (Er
domain of $f$
domain of $g$
domain of $f \circ g$
domain of $g \circ f$
