For a unit step signal u (t), the response is V1 (t) = (1-e-3t) for t> – McqOptions

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1.	For a unit step signal u (t), the response is V1 (t) = (1-e-3t) for t>0. If a signal 3u (t) + (t) is applied, the response will be (considering zero initial conditions)?
A.	(3-6e<sup>-3t</sup>)u(t)
B.	(3-3e<sup>-3t</sup>)u(t)
C.	3u(t)
D.	(3+3e<sup>-3t</sup>)u(t)
Answer» D. (3+3e<sup>-3t</sup>)u(t)

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