How do I solve the problem below using maple commands? I'm having trouble finding the commands and believe my answer is incorrect. I am currentley on maple 2022. 
How would I find an equation of the line tangent to the graph of f(x) when x =3?
f(x)= (1-kx)/(1+x^2)
f := x -> x^2 + 2*x + 1;

Thank you.