1.

The unit step response y(t) of a linear system is defined asy(t) = (1 – 3e-t + 3e-2t)u(t)For the system function, the frequency at which the forced response becomes zero is:

A. 1/√2 rad/s
B. ½ rad/s
C. √2 rad/s
D. 2 rad/s
Answer» D. 2 rad/s


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