Question: A control system whose step response is -0.5(1+e-2t) is cascaded to another control block whose impulse response is e-t. What is the transfer function of the cascaded combination?
Options
A : 1/(s+2)(s+1)
B : 1/(s+1)s
C : 1/(s+3)
D : 0.5/(s+1)(s+2)
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