1
$\begingroup$

By taking the partial derivitives and second partialy derivative with respect to x and y I have found that b=-3d and c=-3a but I don't understand the last bit of the question or how to do it.

  • 0
    @jim How did you work that out?2012-11-26
  • 0
    $f(z)=(a+id)z^3 +i*c$ where c is a constant2012-11-26

2 Answers 2