Help on this question of Linear Algebra, thanks. Let A be a square matrix. Prove that...

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Help on this question of Linear Algebra, thanks.

Let A be a square matrix. Prove that A is invertible if and only if det(A) +0.

Answer 1

Answer #1

An non B 0 Let A be an nxn invertible matrix. Then there exista matmise such that AB= BA = In. We have det AB = det In=1, er

Answer 2

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