54 views

A system with transfer function

$$G(s)=\frac{(s^2+9)(s+2)}{(s+1)(s+3)(s+4)}$$

is excited by $\sin(\omega t)$. The steady-state output of the system is zero at

1. $\omega=1\:rad/s$
2. $\omega=2\:rad/s$
3. $\omega=3\:rad/s$
4. $\omega=4\:rad/s$