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what is actually inverse of matrix?how to find it? please explain briefly?

The inverse of a square matrix A, denoted by A-1, is the matrix so that the product of A and A-1 is the Identity matrix. The identity matrix that results will be the same size as the matrix A. 
The inverse of a 2×2 matrix can be found by ...

1.Switch the elements on the main diagonal
2.Take the opposite of the other two elements
3.Divide all the values by the determinant of the matrix 



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