448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube z-transform of x[n]" class="read-more button" href="https://exam.pscnotes.com/mcq/let-xleft-n-right-left-1-over-9-rightnuleft-n-right-left-1-over-3-rightnuleft-n-1-right-the-region-of-convergence-roc-of-the-z-t/#more-59831">Detailed Solution
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]