Discussion Forum : Automatic Control Systems
Question - If any term in the first column of a Routh array becomes zero, then
Options:
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 complet-ing the array
Answer: Option B

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