EENG$226$

Assignment #$2$

Problem $1$

For each of the following impulse responses of LTI systems, indicate whether or not the system is causal:

$($a$)h[n]=(\frac{1}{2}{)}^{n}u[n]$

$($b$)h[n]=(\frac{1}{2}{)}^{n}u[n-1]$

$($c$)h[n]=(\frac{1}{2}{)}^{|n|}$