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


Apply power rule of differentiation:
.




.
Find the slope at point
.
Slope of the tangent at point is the derivative of the function at that point.
\Substitute
and
in
.

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


.
The tangent line equation is
.
The tangent line equation is
.