The region of convergence of z-transform of the sequence
$${\left( {{5 \over 6}} \right)^n}u\left( n \right) - {\left( {{6 \over 5}} \right)^n}u\left( { - n - 1} \right)$$ must be
A. $$\left| z \right| < {5 \over 6}$$
B. $$\left| z \right| > {5 \over 6}$$
C. $${5 \over 6} < \left| z \right| < {6 \over 5}$$
D. $${6 \over 5} < \left| z \right| < \infty $$
Answer: Option C
This Question Belongs to Electronics And Communications Engineering >> Signal Processing
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