Multiple choice

The ROC of z -transform of the discrete time sequence x (n) = $\left( \dfrac{1}{3} \right)^n u(n) - \left( \dfrac{1}{2} \right)^n$u (- n - 1) is

  1. $\dfrac{1}{3} \lt \left| z \right| \lt \dfrac{1}{2}$
  2. |z| > $\dfrac{1}{2}$
  3. |z| < $\dfrac{1}{3}$

  4. 2 < |z| < 3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Keep practicing — related questions