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What is/are the limitation(s) of the Routh Hurwitz Criterion?

110. What is/are the limitation(s) of the Routh Hurwitz Criterion?

1. Only linear systems are subject to this criterion.
2. On the right and left halves of the S plane, it does not provide the exact location of the poles.
3. This equation can only be used for real coefficients when dealing with the characteristic equation.
4. All of the above

Answer: D) All of the above

Explanation:

The limitations of the Routh Hurwitz Criterion are -

1. Only linear systems are subject to this criterion.
2. On the right and left halves of the S plane, it does not provide the exact location of the poles.
3. This equation can only be used for real coefficients when dealing with the characteristic equation.