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Math Help - Wondering if I did this right..

  1. #1
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    Sep 2008
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    Wondering if I did this right..

    f(x) = 2x sqrt(x^2-1)

    I got my answer as (4x^2 - 2)/sqrt(x^2 - 1).. IS it right??

    Or is the answer (4x^2 - 1)/sqrt(x^2 - 1)??
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  2. #2
    Newbie
    Joined
    May 2008
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    Quote Originally Posted by elpermic View Post
    f(x) = 2x sqrt(x^2-1)

    I got my answer as (4x^2 - 2)/sqrt(x^2 - 1).. IS it right??

    Or is the answer (4x^2 - 1)/sqrt(x^2 - 1)??
    (4x^2 - 2)/sqrt(x^2 - 1)

    That's the right one.
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