Q.18 Consider the sequence 
, where u[n] denotes the unit-step sequence and 0 <| a |<| b |< 1 . The region of convergence (ROC) of the z -transform of x[n] is
(A) |z |>| a |
(B) |z |>| b |
(C) |z |<| a |
(D) |a |<| z |<| b |
Answer: (B)
Explanation:
Q.18 Consider the sequence , where u[n] denotes the unit-step sequence and 0 <| a |<| b |< 1 . The region of convergence (ROC) of the z -transform of x[n] is
(A) |z |>| a |
(B) |z |>| b |
(C) |z |<| a |
(D) |a |<| z |<| b |
Answer: (B)
Explanation:
