Automatic Control Systems - ECE Questions and Answers

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Consider the following statements:

The positiveness of coefficients of characteristic equation is necessary as well as sufficient condition for stability of first and second order systems.
The positiveness of coefficients of characteristic equation ensures negativeness of real roots but is not sufficient condition for stability of third and higher order systems.

Out of above statements:

only 1 is correct

both 1 and 2 are correct

only 2 is correct

both are wrong