Re: [sympy] Sympy exponential equation

2015-06-06 Thread Paul Royik
Thank you. On Friday, June 5, 2015 at 11:52:11 PM UTC+3, Aaron Meurer wrote: 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) +

[sympy] Sympy exponential equation

2015-06-05 Thread Paul Royik
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,

Re: [sympy] Sympy exponential equation

2015-06-05 Thread Aaron Meurer
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) +

Re: [sympy] Sympy exponential equation

2015-06-05 Thread Paul Royik
OK. Thank you. I just wondered because in sage it is not implemented as well. On Friday, June 5, 2015 at 11:48:15 PM UTC+3, Aaron Meurer 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