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1. |
Let Y(s) be the unit-step response of a causal system having a transfer function\(G\left( s \right) = \frac{{3 - s}}{{\left( {s + 1} \right)\left( {s + 3} \right)}}\)that is, \(Y\left( s \right) = \frac{{G\left( s \right)}}{S}\). The forced response of the system is |
A. | u(t) – 2e -t + e-3t u(t) |
B. | 2 u(t) – 2e -t + e-3t u(t) |
C. | 2u(t) |
D. | u(t) |
Answer» E. | |