Re: [理工] [線代]-行列式證明題

[yyc2008 ()]

※ 引述《ruby791104 (阿年：）)》之銘言：
: 2.Let A and B be 2 ×2 matrices.
:   (a)Does det(A+B) = det(A) + det(B)？

Wrong

Eg. A = B = I

:   (b)Does det(AB) = det(A)det(B)？

Right

only 2*2

You can expand it.

:   (c)Does det(AB) = det(BA)？

Right

det(AB) = det(A)det(B)

        = det(B)det(A)

        = det(BA)



:   Justify answers.



: 以上，麻煩好心的大大！（鞠躬

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