1. ## Digital System

Hi, I am wondering if anyone could help me with this please. I am not sure which properties the following digital system displays

Question: Which of the following properties are exhibited by the digital system represented by

h[n] = r [4-n]u[n]?

Linearity, time- variance, causality stability and memory.

NB: r[n] is the ramp function and u[n] is the step function.

I am not sure how to work it out. sorry and thanks

2. ## Re: Digital System

first thing to do is ensure you know what all those terms mean.

once you do determining which of those properties $h[n]$ has is pretty simple.