(a)
\The function is
.
Power rule of derivatives:
.

Differentiate on each side with respect to
.
Differentiate on each side with respect to
.
Differentiate on each side with respect to
.

Similarly
derivative of the function is in the following form.

\
(b)
\The function is
.
Differentiate on each side with respect to
.
Power rule of derivatives:
.
Differentiate on each side with respect to
.
Differentiate on each side with respect to
.
Observe the pattern of above derivatives and find
derivative.
\
(a) 
(b)