The function is
.
Derivative of a function
is defined as
.











Substitute
in above expression.



.
The domain of
.
The Domain of a function is all values of
, those makes the function mathematically correct.
Denominator of the function should not be zero.
\Hence, 

The domain of function
is
.
The domain of
.
Denominator of the function should not be zero.
\Hence, 


The domain of function
is
.
.
The domain of function
is
.
The domain of function
is
.