Question Number 55673 by gunawan last updated on 01/Mar/19
$${f}\left({z}\right)={z}\:\mathrm{Re}\left({z}\right)+\bar {{z}}\:\mathrm{Im}\left({z}\right)\:+\bar {{z}}\: \\ $$$${f}'\left({z}_{\mathrm{0}} \right)=… \\ $$
f-z-z-Re-z-z-Im-z-z-f-z-0-