Ah, it looks like, as with that issue, you can get solve to give you an answer if you pass check=False:
In [21]: print(solve(-(S(21)/20)**(12*x) + 120, x, check=False)) [-log(120**(1/(-log(7355827511386641) + log(4096000000000000))))] which looks like the same answer after some log identities are applied (those large numbers are 21**12 and 20**12, respectively). Aaron Meurer On Fri, Jun 5, 2015 at 3:47 PM, Aaron Meurer <asmeu...@gmail.com> wrote: > I guess it's just not implemented. I think the solution should be > log(120)/log(S(21)/20)/12. This is related to this issue > https://github.com/sympy/sympy/issues/2999. > > Aaron Meurer > > On Fri, Jun 5, 2015 at 10:56 AM, Paul Royik <distantjob...@gmail.com> wrote: >> Hello. >> >> Why solve(-(21/20)**(12*x) + 120, x) gives empty set? >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sympy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sympy+unsubscr...@googlegroups.com. >> To post to this group, send email to sympy@googlegroups.com. >> Visit this group at http://groups.google.com/group/sympy. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sympy/f21f4f8b-aecd-48d1-a738-6bb23ef1058b%40googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6%2BuSGnWxVF2vDR71W7%3Dj5UsM8afM3Cy1RB6PCFZjbi%2BKw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
