1.

Consider the characteristic equations4 + 2s3 + (4 + K) s2 + 9s + 25 = 0The range of K for stability of a system with the above equation is:

A. \(K < \frac{{109}}{{18}}\)
B. \(K > \frac{{109}}{{18}}\)
C. \(K > \frac{{19}}{{180}}\)
D. \(K > - \frac{{109}}{{18}}\)
Answer» C. \(K > \frac{{19}}{{180}}\)


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