On 2017-01-22, Dima Pasechnik <dimp...@gmail.com> wrote:

> (%i1) limit((2^(2*x+1)+(2^x*x^100)^(3/2))/(4^x-100*2^x),x,inf);
> (%o1)                                  2
>
> Although calling this version of Maxima as  
> sage: ((2^(2*x+1)+(2^x*x^100)^(3/2))/(4^x-100*2^x)).limit(x=infinity)
>
> gives -Infinity, still, as it's not called with default settings, but with 
> something that breaks it sometimes.

With Maxima 5.39.0 I find that domain=complex seems to tickle the bug.

(%i1) domain;
(%o1)                                real
(%i2) limit((2^(2*x+1)+(2^x*x^100)^(3/2))/(4^x-100*2^x),x,inf);
(%o2)                                  2
(%i3) domain:complex $
(%i4) limit((2^(2*x+1)+(2^x*x^100)^(3/2))/(4^x-100*2^x),x,inf);
(%o4)                                minf

I've opened https://sourceforge.net/p/maxima/bugs/3279/ for this and
also https://sourceforge.net/p/maxima/bugs/3280 for a related bug.

HTH

Robert Dodier


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