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
.
.