FINDING ADJOINT OF A MATRIX EXAMPLES

Let A be a square matrix of order n.

The adjoint of square matrix A is defined as the transpose of the matrix of minors of A. It is denoted by adj A.

Here, 

M_ij is the minor of a_ij^th element of the given matrix.

Adjoint of square matrix A of order 3 is given below :

Find the adjoint of the following matrices :

Example 1 :

Solution :

Example 2 : 

Solution :

Example 3 : 

Solution :

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