Find the Inverse of the Function $$f ( x ) = 5 ^ { x }$$

Multiple Choice

Find the inverse of the function.
- $$f ( x ) = 5 ^ { x }$$

A) $f ^ { - 1 } ( x ) = \log _ { 5 } x$
B) $f ^ { - 1 } ( x ) = x ^ { 5 }$
C) $f ^ { - 1 } ( x ) = \ln ( 5 x )$
D) $f ^ { - 1 } ( x ) = \log _ { x } 5$