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


Derivative of the natural logarithm:
.

.
Slope of the tangent is derivative of the function at the given point.
\
Slope of the tangent at
is
.
Point-slope form of line equation:
.
Substitute
and
in the above formula.

Tangent line is
.
Tangent line is
.