The curve is and the point is
.
Apply derivative on each side with respect to .
Apply power rule of differentiation :.
Apply product rule of differentiation :.
.
Slope of the tangent at point is the derivative of the function at that point.
\The derivative of the function at .
Substitute and
in
.
.
Slope of the tangent at point is
.
Slope of the tangent at point is
.