Q. 24.1( 30 Votes )

Find adjoint of each of the matrices.


Answer :

Adjoint of the matrix A = [aij]n×n is defined as the transpose of the matrix [Aij]n×n where Aij is the co-factor of the element aij.

Let’s find the cofactors for all the positions first-


Here, A11 = 1{(3×1-0×5)} = 3


Similarly,


A12 = -12, A13 = 6, A21 = 1, A22 = 5, A23 = 2, A31 = -11, A32 = -1, A33 = 5.




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