If the region of convergence of x1[n] + x2[n] is $${1 \over 3} < \left| z \right| < {2 \over 3},$$ then the region of convergence of x1[n] - x2[n] includes
A. $${1 \over 3} < \left| z \right| < 3$$
B. $${2 \over 3} < \left| z \right| < 3$$
C. $${3 \over 2} < \left| z \right| < 3$$
D. $${1 \over 3} < \left| z \right| < {2 \over 3}$$
Answer: Option D
This Question Belongs to Electronics And Communications Engineering >> Signal Processing
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