Sketch Nyquist plots for the following feedback systems and determine therefrom whether or not the system is
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Sketch Nyquist plots for the following feedback systems and determine therefrom whether or not the system is stable.
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X(s) X(s). 4 S 4 (s + 3) 1 s + 1 (a) 1 s+1 (b) 3 2 S +4 Y(s) Y(s)
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