HW2 discussion, ECE301 Spring 2011, Prof. Boutin

If they make a silly math mistake, like off by a negative, and carry it thought and all the steps are right should we take off?

In problem 5b should that be +2jw in the numerator of $ X(w) $ instead of -2jw? It looks like a time shift of $ t_0=2 $ and then $ e^{-at}u(t) = \frac{1}{a+i\omega} $.