# Complex analysis

#### Athi

Find the first and second derivatives of the following function at point 2 + i .

h(z)=(z^2-9)/(z^2+1)

#### romsek

Math Team
this is pretty straightforward.

$\dfrac{d}{dz} \dfrac{f(z)}{g(z)} = \dfrac{f'(z)g(z) - f(z)g'(z)}{(g(z))^2}$

anything in particular you are having trouble with?

topsquark