If
f(x) = \frac{2x}{1+x^{2}}
find f'( 4 ) .

f'( 4 ) =

Use this to find an equation of the tangent line to the curvey = f(x) at the point \left( 4 , {\frac{8}{17}} \right) .

An equation of the tangent line isy = .

Use this to find an equation of the tangent line to the curve

An equation of the tangent line is

You can earn partial credit on this problem.