Systems Analysis and Control

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4 a a 2 a 3 a 1 0 a 3 b 2 = det 4 a a a 3 0 a 3 b 3 = det a 4 0 a 3 0 a 3 The denominator is the rst entry from the previous row. The numerator is the determinant of the entries from the previous two rows: I The rst column I The next column following the coe cient b k = det n a a n 2k a n 1 a n 2k 1 a n 1 I If a coe cient doesn’t exist ...