Right, subst, not ratsubst. As far as x/D^2 ... No reason. If I had thought
about it for another 10 seconds I would have seen that x/D was fine, as you
say.
> -----Original Message-----
> From: maxima-bounces at math.utexas.edu
> [mailto:maxima-bounces at math.utexas.edu] On Behalf Of Daniel Lakeland
>>
> ratsubst(q,x/D,a);
> factor(%);
> subst(q=x/D,%);
>
> What made you try the substitution of q=x/D^2 rather than x/D ?? This
> substitution works in the ratsubst above as well, but is less
> intuitive since the original question was to get the result in terms
> of x/D.
>
> I knew I would learn something useful from this question.
>
>
> --
> Daniel Lakeland
> dlakelan at street-artists.org
> http://www.street-artists.org/~dlakelan
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