Let F (X) = $\sqrt { 16 - x ^ { 2 } }$

Essay

Let f (x) = $\sqrt { 16 - x ^ { 2 } }$ . Find each of the following:
(a) f (0) $+$ f ( $- 2$ )
(b) f (x $+$ 2)
(c) [f (x)] $2$ (d) f (x $2$ )