How can i solve this limit

Questions
1

Limit[z^n/(1-z), n->Infinity].

help me out plz

2

Put an assumption on the magnitude of z.

Limit[z^n/(1-z), n->Infinity, Assumptions->Abs[z]<1]                    

(* Out[2]= 0 *)

Limit[z^n/(1-z), n->Infinity, Assumptions->Abs[z]>1]                    

(* Out[3]= ComplexInfinity *)
3

Thanks Daniel
Regards