The function is  and tangent passes the point is .

Let  be the point at which tangent line intersects the curve.

Substitute  in the function.

.

Point of tangency is .

Apply derivative on each side with respect to .

Quotient rule of derivatives : .

.

Slope of the tangent line is derivative of the function at .

Substitute  in the derivative function.

.

Slope of the tangent line to the curve at the point  is .

Slope of a tangent line : .

Slope of a tangent line with points  and  is

.

Slope of the tangent line to the curve is .

Substitute  in the slope of the tangent line.

 and 

 and .

Substitute  in the function.

Point of tangency is .

Substitute  in the function.

Point of tangency is .

Find the tangent line.

Point-slope form of line equation : , where slope .

Find the tangent line equation passing through the points  and .

Tangent line equation is .

Find the tangent line equation passing through the points  and .

Tangent line equation is .

Graph :

Graph the function and the two tangent lines.

Tangent line equations is  and .