If $f ( x ) = \frac { 3 } { x ^ { 2 } } + 1$,

1. Find the domain and range of $f(x)$.

   Hint (a):

   Domain: Notice the $x$ in the denominator. What values of $x$ must be excluded?
   Range: Notice that $x$ is squared. What does this mean about the outputs of $f(x)$? Furthermore, what will the $+1$ do to the range?

2. Find expressions for $f(-x)$, $f ( \sqrt { x } )$, and $f(x + h)$.

   Hint (b):

   $f(\sqrt{x})=\frac{3}{(\sqrt{x})^2}+1=$ SIMPLIFY