On Sun, Jan 22, 2017 at 7:14 AM, Peleg Michaeli <freepe...@gmail.com> wrote: > Hi, > > sage: ((2^(2*x+1)+(2^x*x^100)^(3/2))/(4^x-100*2^x)).limit(x=infinity) > -Infinity > > This is a wrong answer. It should be 2. > > Replacing 3/2 in the power by 1, 2, or 3 (at least) gives correct answers > (2, inf, inf). Replacing it by 5/2 given a wrong answer again. > > Is this related to a known bug?
I don't know if it is known - - you can try searching https://trac.sagemath.org/, which lists all bugs we know of. This is actually a bug in **MAXIMA**, which Sage calls to do this limit: http://maxima.sourceforge.net/ If you call sympy instead it gets the right answer: sage: ((2^(2*x+1)+(2^x*x^100)^(3/2))/(4^x-100*2^x)).limit(x=infinity, algorithm="sympy") 2 sage: ((2^(2*x+1)+(2^x*x^100)^(3/2))/(4^x-100*2^x)).limit(x=infinity, algorithm="maxima_taylor") -Infinity sage: ((2^(2*x+1)+(2^x*x^100)^(3/2))/(4^x-100*2^x)).limit(x=infinity, algorithm="maxima") -Infinity > > > Thanks, > Peleg. > > -- > You received this message because you are subscribed to the Google Groups > "sage-support" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-support+unsubscr...@googlegroups.com. > To post to this group, send email to sage-support@googlegroups.com. > Visit this group at https://groups.google.com/group/sage-support. > For more options, visit https://groups.google.com/d/optout. -- William (http://wstein.org) -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
