Question

find the partial derivative of
\[f(x,y) = \ln(x+\sqrt{(x^{2}+y^{2})}); f_x(3,4)\]
so I found the partial derivative to be:

\[f_x(x,y) = (\frac{1}{x + \sqrt{x^2 + y^2}})(\frac{2x+1}{2\sqrt{x^2+y^2}})\]

how do I answer this question?