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...Cbse test paper chapter determinants the roots of equation det are a none these b and c d if is transpose square matrix then f x any matrices implies or multiplying determinant by k means elements only one row column in can be expressed as sum two more given find adj for singular not evaluate area whose vertices line joining using point such that unit ab i properties prove use this result solving following system y z solution explanation expanding along its always same because we interchange rows into value remains unaltered put apply r hence according to question have now let first...