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For a Stable, Physical System, Which of the Following is True?

For a stable, physical system, which of the following is true?

a. All the elements of the first column of the Routh stability table have the same sign.
b. The elements of the first column of the Routh stability table can have either plus or minus signs.
c. Neither of these.
See attached file for full problem description.

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Routh Stability Criteria:

For system stability the primary requirement is that all of the roots ...

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The solution provides detailed explanations for the problem of Routh stability.

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