\
The function is
.
Find
.
.
Apply derivative on each side with respect to
.

Power rule of derivatives :
.
.
\
.
Apply second derivative on each side with respect to
.

.
\
.
Apply third derivative on each side with respect to
.

.
Observe the sequence.
\The
derivative of the function can be written as

The
derivative of the function is
.
\
The
derivative of the function is
.