Evaluate the Limit If It Exists $$\lim _ { h \rightarrow 0 } \frac { ( 4 + h ) ^ { - 1 } - 4 ^ { - 1 } } { h }$$

Essay

Evaluate the limit if it exists. $$\lim _ { h \rightarrow 0 } \frac { ( 4 + h ) ^ { - 1 } - 4 ^ { - 1 } } { h }$$