Consider a two-sided discrete-time signal (neither left sided, nor rig – McqOptions

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1.	Consider a two-sided discrete-time signal (neither left sided, nor right sided). The region of convergence (ROC) of the z-transform of the sequence is:1) All region of z-plane outside a unit circle (in z-plane)2) All region of z-plane inside a unit circle (in z-plane)3) Ring in z-planeWhich of the above is/are correct?
A.	1 only
B.	2 only
C.	3 only
D.	1 and 3
Answer» D. 1 and 3

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