Complex analysis

Dec 2019
1
0
Malaysia
Anyone please help me

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
Sep 2015
2,679
1,481
USA
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?
 
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