13)Show that the function f (z)=(z̅ )²/z,z≠0 ;0, z=0 satiesfies Cauchy-Rieman equations at z=0.Does f'(0) exist? Explain the problem with step by step process?
When the horizontal line and vertical line approach towards the origin
for horizontal line
for vertical line
or z= 0
So f'(0) does not exist when