Q. 2 A5.0( 1 Vote )

# Find the adjoint of each of the following Matrices and Verify that (adj A) A = |A| I = A (adj A) Verify that (adj A) A=|A| I=A (adj A) for the above matrices.

A = Cofactors of A are:

C11 = – 3 C21 = 2 C31 = 2

C12 = 2 C22 = – 3 C23 = 2

C13 = 2 C23 = 2 C33 = – 3

adj A = = Now, (adj A).A = = = Also, |A|.I = = ( – 3 + 4 + 4) = Then, A.(adj A) = = = Rate this question :

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