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Math Help - How to prove

  1. #1
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    How to prove

    Hi Friends

    How to prove
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  2. #2
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    Re: How to prove

    From what I see, it says "How to prove" then an icon indicating that you probably uploaded something but I'm unable to view it (I'm pretty sure I have the latest Adobe version...).
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  3. #3
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    Re: How to prove

    The image apparently says (ABC)⁻ = C⁻B⁻A⁻. This is because (ABC)(C⁻B⁻A⁻) = E (i.e., identity). The inverse element is unique, so since C⁻B⁻A⁻ is an inverse of ABC, it is the inverse.
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  4. #4
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    Re: How to prove

    before it, ensure all matrix are invertible first or its inverts don't exist causing it is wrong
    (AB)-1 = B-1A-1
    Then, put B=CD,
    ie (ACD)-1 = (CD)-1A-1
    = D-1C-1A-1

    Hence, prove completed
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