(adsbygoogle = window.adsbygoogle || []).push({}); 1. The proof that det(kA) = k^ndetA where A is nxn

I read somewhere that det(rI(n)) = r^(n)

so det(rA) = det(rI(n).A) = r^ndetA but I am really confused about how they got that? Is I the identity matrix? What would the det(I) be?

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# Homework Help: Help with Determinants

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