The function is
and the point is
.
Apply derivative on each side with respect to
.

Apply quotient rule of differentiation:
.
In this case
and
.


.
Slope of the tangent line at the point is
.
Substitute
in the
.
Slope of the tangent line is
.
Find the tangent line.
\Point-slope form of line equation
.
Substitute
and
.
The tangent line is
.
Graph :
\Graph the function
and tangent line
at
.
The tangent line is
.
Graph :
\Graph of the function
and tangent line
at
.
.