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Linear Algebra : Cofactors and Inverse of Matrix

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Find the cofactor of each element of A=[-1 1 2 3; 1 2 3 4; -1 1 -1 5; 1 -1 1 2] and also the inverse. I am having trouble with this 4 x 4 matrix.

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Cofactors and inverse of a 4x4 matrix are found. The solution is detailed and well presented.

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