Q1 of 127 Page 131

Find adjoint of each of the matrices.

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 = 4, A12 = -3, A21 = -2, A22 = 1.


∴ Adj A =


=


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