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April 14th, 2018, 12:59 PM   #1
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Property of adjoint

How to prove this property of adjoint? I checked it on few examples, but I don't know how to prove it rigorously.
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April 14th, 2018, 07:23 PM   #2
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Don't you know that $\det(kA)=k^n\det(A)$ for any $n\times n$ matrix A? A proof of your problem should follow immediately.
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