Sketch the root locus plot of 3s 2 + cs + 12 = 0 for c

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Sketch the root locus plot of 3s2 + cs + 12 = 0 for c ≥ 0. What is the smallest possible dominant time constant, and what value of c gives this time constant? What is the value of ωn if ζ < 1?
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System Dynamics

ISBN: 978-0073398068

3rd edition

Authors: William Palm III

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