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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 | |