Question: Express each of the following in a simpler form:
Use properties of the impulse signal δ(t) and the unit-step signal u(t) to perform the simplifications. Be careful to distinguish between multiplication and convolution. Convolution is denoted by a "star", as in x(t)*δ(t -2) = x(t - 2) and multiplication is usually in-dicated by juxtaposition as in x(t)δ(1 -2) = x(2)δ(t-2).