Given a matrix A of order 3x3. If |A|=3 then the value of |A(adj A)| is:
Given a matrix A of order 3x3. If |A|=3 then the value of |A(adj A)| is:
Solution
✅ Correct Option: 2
Given a matrix of order with .
The adjoint of matrix satisfies the property:
where is the identity matrix of the same order.
Substituting :
Taking the determinant of both sides:
For a identity matrix, when multiplied by scalar :
where is the order of the matrix.
Since the matrix is :
Therefore,
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