Find the Inverse of the Function $$f ( x ) = e ^ { 7 x }$$

Multiple Choice

Find the inverse of the function.
- $$f ( x ) = e ^ { 7 x }$$

A) $f ^ { - 1 } ( x ) = 7 \ln x$
B) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 1 } { 7 } \ln \mathrm { x }$
C) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \ln \left( \frac { 1 } { 7 } \mathrm { x } \right)$
D) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = - 7 \ln \mathrm { x }$