A first order linear system is initially relaxed for a unit step signal u(t), the response is v(t) = (1 – e-3t), for t > 0. If a signal 3u(t) + δ(t) is applied to the same system, the response is

A first order linear system is initially relaxed for a unit step signa

1.	A first order linear system is initially relaxed for a unit step signal u(t), the response is v(t) = (1 – e-3t), for t > 0. If a signal 3u(t) + δ(t) is applied to the same system, the response is
A.	(3 – 6e-3t) u(t)
B.	(3 – 3e-3t) u(t)
C.	3u(t)
D.	(3 + 3e3t) u(t)
Answer» D. (3 + 3e3t) u(t)