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Thread: determinant

  1. December 23rd 2008, 06:43 AM #1
    mathseek
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    determinant

    det(A)=4

    therefore
    det(a^3)=?

    my ans is =64

    plse check my ans thks....
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  2. December 23rd 2008, 06:54 AM #2
    M_O'Loughlin
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    Quote Originally Posted by mathseek View Post
    det(A)=4

    therefore
    det(a^3)=?

    my ans is =64

    plse check my ans thks....
    Yes, you are correct.
    det(AB) = det(A)det(B)
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  3. December 23rd 2008, 06:55 AM #3
    HallsofIvy
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    deg(AB= det(A)det(B) so det(A^3)= (det(A))^3. Yes, that is correct.
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