Re: Calculating derivate in Mathematica 9 giving wrong
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- Subject: [mg131416] Re: Calculating derivate in Mathematica 9 giving wrong
- From: "Louis Talman" <talmanl at gmail.com>
- Date: Wed, 3 Jul 2013 22:01:02 -0400 (EDT)
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Asking for the derivatives of the same expressions might give you the same, or at least equivalent, results. On Wed, 03 Jul 2013 03:01:46 -0600, James <jhlawley at gmail.com> wrote: > In[5]:= D[(x^2 - 2)/(x^3 + 6), x] > Out[5]= -((3 x^2 (-2 + x^2))/(6 + x^3)^2) + (2 x)/(6 + x^3) > That is from Mathematica 9. > The wolfram alpha site and my textbook give this answer: > d/dx((x^2+x-2)/(x^3+6)) = (-x^4-2 x^3+6 x^2+12x+6)/(x^3+6)^2 > Please tell me what I am doing wrong. --Louis A. Talman Department of Mathematical and Computer Sciences Metropolitan State University of Denver <http://rowdy.msudenver.edu/~talmanl>
- References:
- Calculating derivate in Mathematica 9 giving wrong result
- From: James <jhlawley@gmail.com>
- Calculating derivate in Mathematica 9 giving wrong result