# Matrix Proof: Determinants

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1. Show that if   0, then A^-1=1/ [ d -b ]

[ -c a ] .

Help:

: is the determinant A

[ d -b]

[ -c a ] : is a 2 x 2 matrices

https://brainmass.com/math/matrices/matrix-proof-determinants-12701

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#### Solution Summary

A proof for a matrix determinant is provided. The solution is detailed and well presented.

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