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Discussion

If any term in the first column of a Routh array becomes zero, then

  • A.Routh criterion cannot be used to determine stability
  • B.Routh criterion can be used by substituting a small positive number for zero and completing the array
  • C.Routh criterion can be used by substituting a big positive number for zero and completing the array
  • D.Routh criterion can be used by substituting a small negative number for zero and completing the array

Answer: B

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