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3. Given the closed loop transfer function bellow find a. The range of K for stability b. The value of K for marginally stable

3. Given the closed loop transfer fanction bellow find a. The range of K for stability b. The val ue of K for marginally stable system and the frequency of oscillation roots of auxiliary even polynomial to find system poles 5K (s 4) 5 s3 + 16 s2 + (12 +5 K)s + 20 K

3. Given the closed loop transfer function bellow find a. The range of K for stability b. The value of K for marginally stable system and the frequency of oscillation [Hint: Use the roots of auxiliary even polynomial to find system poles] 5K(s + 4) 7(s) = 5s3 + 16 s + (12 + 5 K)s + 20 K

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