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
This Question Belongs to Electronics And Communications Engineering >> Signal Processing
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