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The __________ of the coefficients of characteristic equation is necessary as well as sufficient condition for the stability of system of first and second order.

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The __________ of the coefficients of characteristic equation is necessary as well as sufficient condition for the stability of system of first and second order.

(a) Negativeness

(b) Positiveness

(c) Positiveness and Negativeness

(d) None of the mentioned

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Question is from Necessary Conditions for Stability and Non-Linear Systems in division Stability and Algebraic Criteria of Control Systems

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The correct choice is (b) Positiveness

The best explanation: The Positiveness of the coefficients of characteristic equation is necessary as well as sufficient condition for the stability of system of first and second order.

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