Lecture : 6 -b^n(u-n-1) Z Transform and ROC of Infinite Duration Non-Causal Sequence

In this lecture, we will learn how to find the Z-Transform and Region of Convergence (ROC) for an infinite-duration non-causal sequence of the form: x[n] = (-b)^n u(-n-1) This lecture focuses on understanding how the unit step sequence, negative-time sequence, and ROC are related in the Z-Transform. 🔹 Topics Covered: ✅ Z-Transform of infinite-duration sequences ✅ Non-causal / left-sided sequences ✅ Z-Transform of (-b)^n u(-n-1) ✅ Step-by-step derivation ✅ Understanding negative-time sequences ✅ Finding the Region of Convergence (ROC) ✅ Relationship between sequence type and ROC ✅ Important concepts for Signals & Systems exams and interviews