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
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