Here is a question in the textbook that I have no idea how to do:
Consider a causal LTI system with input x[n] and output y[n]
y[n] = 0.25 y[n-1] + x[n]
Determine y[n] if x[n] = UnitImpulse[n-1]
The solution starts off with "Since the system is causal, y[n] = 0 for n < 1".... but I don't understand how they are able to say that...Why do they say this?
Consider a causal LTI system with input x[n] and output y[n]
y[n] = 0.25 y[n-1] + x[n]
Determine y[n] if x[n] = UnitImpulse[n-1]
The solution starts off with "Since the system is causal, y[n] = 0 for n < 1".... but I don't understand how they are able to say that...Why do they say this?