Routh Array: Arrange the coefficients of characteristic equation into the first two rows follows: the Routh array, as Row 1 26 07 00 ai bi C di ei fi 2 3 4 5 6 7 n + 1 a2 43 b2 C2 d2 e2 a 4 as b3 C3 81 The array has been filled in for n = 7 in order to simplify the discussion. For any other value of n, the array is prepared in the same manner. In general, there are (n + 1) rows. For n even, the first row has one more element than the second row.The elements in the remaining rows are found from the formulas