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AB=BA Adjugate arithmetic array of numbers augment matrix Bazar Book Depot Book Stall Bunder Road called Chamber of Commerce column matrix commutative i.e. commutative law Cos2 Dacca defined denoted determinant of order diagonal elements diagonal matrix Distt elementary transformation equal i.e. Equivalent Matrices Evaluate example f g f factor of zero Find all matrices finding the inverse following matrices gonal h b f identity matrix Karachi Katchery Road Laplace expansion latent roots left hand factor m x n matrix of order non-singular matrix non-singular or regular number of columns number of rows numbers is commutative order determinant order m x order n x n ordinary algebra ordinary number orthogonal matrix post-multiplied principal diagonal Prove Ramna rank right hand factor row matrix scalar Show sin2 singular skew symmetric skew-symmetric matrix square matrix Stationery Mart symmetric matrix th column th row transpose triangular unit matrix West Pakistan x+y+z zero matrix