Find an Equation for the Inverse Function $$f ( x ) = 10 ^ { x + 1 } + 5$$

Multiple Choice

Find an equation for the inverse function.
- $$f ( x ) = 10 ^ { x + 1 } + 5$$

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