The function is
, for
.
Rewrite the function as
.
Differentiate on each side with respect to
.




for all
, then
has an inverse.
Find the inverse function.
\
.
Interchange
and
terms.

Solve for
.


Take natural logarithm on each side.
\
Apply power rule of logarithm :
.


Replace
with
.
.
Therefore, the inverse function is
.
The inverse function exists only for
.
The inverse function is
.
The inverse function exists only for
.