Around 21:00,.In general case of R^n, you can not form a determinant of A and B unless n=2. Hmmm####[['R^n', 'Mathematical_Related_Concept', 'NEU'], ['determinant', 'Mathematical_Related_Concept', 'NEU'], ['A', 'Mathematical_Related_Concept', 'NEU'], ['B', 'Mathematical_Related_Concept', 'NEU'], ['n=2', 'Mathematical_Related_Concept', 'NEU']]