Question:-
The z-transform X(z) of a sequence x[n] is given by

If X(z) converges for |z|= 1 then x[-18] is
Option (A)
-(1/9)
Option (B)
-(2/21)
Option(C)
-(1/10)
Option(D)
-(2/27)
Correct Option:
(B)
question-answer-faq-2011