The ROC of z-transform of the discrete time sequence
$$x\left( n \right) = {\left( {{1 \over 3}} \right)^n}u\left( n \right) - {\left( {{1 \over 2}} \right)^n}u\left( { - n - 1} \right)$$ is
A. $${1 \over 3} < \left| z \right| < {1 \over 2}$$
B. $$\left| z \right| > {1 \over 2}$$
C. $$\left| z \right| < {1 \over 3}$$
D. $$2 < \left| z \right| < 3$$
Answer: Option A
This Question Belongs to Electronics And Communications Engineering >> Signal Processing
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