The function is  and the equation of parallel line is .

The slope of the tangent line is the derivative of the function.

Apply derivative on each side with respect to .

Quotient rule of derivatives : .

Slope of the tangent line is .

The parallel line is .

Rewrite the line equation.

Compare the above line with slope - intercept form of a line equation : .

Slope of the parallel line is .

Slope of the parallel lines are equal.

Hence slope of the tangent line parallel to the line  is .

Substitute  in 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 equation at point .

Point-slope form of line equation : .

Substitute  and  in point-slope form.

Equation of the tangent line at the point  is .

Find the tangent line equation at point .

Point-slope form of line equation : .

Substitute  and  in point-slope form.

Equation of the tangent line at the point  is .

Equation of the tangent lines are  and .