Compute the inverse of the following matrix. – InterviewSolution

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Compute the inverse of the following matrix.

Answer»

The inverse of A is A-1 only when A × A-1 = A-1 × A = l
To find the inverse of a 2x2 MATRIX: SWAP the POSITIONS of a and d, put negatives in front of b and c, and divide everything by the determinant (ad-bc).
Sometimes there is no inverse at all.

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