Question Number 132635 by mohammad17 last updated on 15/Feb/21
$${where}\:{is}\:{to}\:{be}\:{the}\:{function}\: \\ $$$${f}\left({z}\right)={zRez}+\overset{−} {{z}Imz}+\overset{−} {{z}}\:{diffrentable}\:{and} \\ $$$${find}\:{the}\:{dervaitive}? \\ $$
Commented by mohammad17 last updated on 16/Feb/21
$$????? \\ $$