(a) The equation of the curve is  and the point is .

The slope of an tangent is the derivative of the curve at given point.

.

Quotient rule of differentiation:  .

The slope of the tangent line at :

The equation of the tangent at  :

Point - Slope form: .

Substitute and in above formula.

The equation of the tangent at is .

(b)

The graph of the function and the tangent line.

(a) The equation of the tangent at is .

(b)

Graph the equation.

.