Step 1:
\The function is 
The domain of the function is
.
Consider 
Find the inverse function.
\
Interchange the variables
and
.

Above function is in the form
, where 
The inverse function is
.
Step 2:
\Find the range of function.
\
.

The range of
lies in
.
Also, the range of
lies in
.

The range of
is
.
The range of
is equal to the domain of
.
The domain of
is
.
Step 3:
\The inverse function is
.
The domain of
is
.
The domain of
is equal to the range of
.
The range of
is
.
Solution:
\The inverse function is
.
The range of
is
.
The domain of
is
.
The range of
is
.