The Functions $f ( x ) = 3 ^ { x }$

Multiple Choice

The functions $f ( x ) = 3 ^ { x }$ and $g ( x )$ are inverse functions. Find the $g ( x )$

A) $g ( x ) = \log _ { 3 } x$
B) $g ( x ) = \ln x$
C) $g ( x ) = \sqrt [ 3 ] { x }$
D) $g ( x ) = x ^ { 3 }$
E) $g ( x ) = \log x$