- #1
Natalie89
- 29
- 0
Homework Statement
Determine if y(n)=a^(|n|) is causal
Homework Equations
A system is causal if the output taken at anytime depends only on present and past inputs.
The Attempt at a Solution
I think the system is causal because the exponent, |n|, would represent a present value of 'n', but would this be the case when taking the magnitude of a value?