The function is and the point is
.
Apply derivative on each side with respect to .
.
Slope 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
in point-slope form.
.
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
.
.