GATE EE 2015 Set 1 | GATE EE Year Wise Previous Years Questions

GATE EE 2015 Set 1

MCQ (Single Correct Answer)

-0.6

Consider a discrete time signal given by
x[n]=(-0.25)ⁿu[n]+(0.5)ⁿu[-n-1]
The region of convergence of its Z-transform would be

the region inside the circle of radius 0.5 and centered at origin.

the region outside the circle of radius 0.25 and centered at origin.

the annular region between the two circles, both centered at origin and having radii 0.25 and 0.5.

the entire Z plane.

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