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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- Oct 13th 2008, 07:54 PMelpermicWondering 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)?? - Oct 13th 2008, 08:58 PMfalconed