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The inverse of matrix A = is
The given matrix is A =
The inverse of a matrix is given by
...(1)
Now, determinant of matrix A is
|A| =
= (3)(2) - (2)(1)
= 6 - 2
= 4
Now, adjoint A will be
= 3
= -1
= -2
= 2
AdjA =
Now, substituting the values of |A| and AdjA in equation (1), we get
Therefore,
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