A control system whose step response is -0.5(1+e-2t) is cascaded to a – McqOptions

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1.	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?
A.	1/(s+2)(s+1)
B.	1/(s+1)s
C.	1/(s+3)
D.	0.5/(s+1)(s+2)
Answer» B. 1/(s+1)s

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