📘 digital signal processing

1. **Problem Statement:** Define Digital Signal Processing (DSP), distinguish analog and digital signals, analyze a given analog signal for Nyquist rate and sampled discrete-time s

1. **Problem Statement:** Solve question 1 part b from the Digital Signal Processing exam.

1. **Problem:** Determine the z-transform and ROC for the sequence $x[n] = (3n + 2 \times 3^n) u[n-1]$. 2. **Formula:** The z-transform of a sequence $x[n]$ is defined as $$X(z) =