Let $$x\left[ n \right] = {\left( { - {1 \over 9}} \right)^n}u\left( n \right) - {\left( { - {1 \over 3}} \right)^n}u\left( { - n - 1} \right).$$
The Region of Convergence (ROC) of the z-transform of x[n]
A. Is $$\left| z \right| > {1 \over 9}$$
B. Is $$\left| z \right| < {1 \over 3}$$
C. Is $${1 \over 3} > \left| z \right| > {1 \over 9}$$
D. Does not exist
Answer: Option C
Related Questions on Signal Processing
The Fourier transform of a real valued time signal has
A. Odd symmetry
B. Even symmetry
C. Conjugate symmetry
D. No symmetry
A. $$V$$
B. $${{{T_1} - {T_2}} \over T}V$$
C. $${V \over {\sqrt 2 }}$$
D. $${{{T_1}} \over {{T_2}}}V$$
A. $$T = \sqrt 2 {T_s}$$
B. T = 1.2Ts
C. Always
D. Never
A. $${{\alpha - \beta } \over {\alpha + \beta }}$$
B. $${{\alpha \beta } \over {\alpha + \beta }}$$
C. α
D. β
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