Q. 54.7( 3 Votes )

Write the adjoint

Answer :

Given, Let A =

To Find: Find the adjoint of a given matrix.


Explanation:


Cofactor of A11 = ( - 1)1 + 1 (3) = 3


Cofactor of A12 = ( - 1)1 + 2(4) = - 4


Cofactor of A21 = ( - 1)2 + 1( - 1) = 1


Cofactor of A12 = ( - 1)2 + 2(2) = 2


Adjoint = Cofactor


Adjoint =


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