Re: odd mathematica blindspot

*To*: mathgroup at smc.vnet.net*Subject*: [mg56473] Re: [mg56468] odd mathematica blindspot*From*: "Matthias Bode" <lvsaba at hotmail.com>*Date*: Tue, 26 Apr 2005 21:52:28 -0400 (EDT)*References*: <200504260533.BAA14442@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi Ed, res01 = Solve[(999999999999/10000000000000)^x == 0.5, x] res01[[1,1,1]] - extracts 'x'. res01[[1,1,2]] - extracts the number (which you probably wanted to extract). Output: {{x -> 0.3010299956638504}} x 0.3010299956638504 Best regards, MATTHIAS BODE Torres Sofer III, depto. 9 A Pedro Borda #1072 esq. Ismael Vásquez COCHABAMBA/BOLIVIA CEL: +591-70 71 56 64 TEL/FAX: +591-4-4 53 34 17 LVSABA at HOTMAIL.COM Time indicated: UTC (=GMT). ----- Original Message ----- From: "Edward Peschko" <esp5 at pge.com> To: mathgroup at smc.vnet.net Subject: [mg56473] [mg56468] odd mathematica blindspot > hey all, > > I was wondering why the following didn't output any solutions. I'd think > it would be easy: > > Solve[(999999999999/10000000000000)^x == .5, x] > > It gives no solutions. What's really odd is when you say: > > Solve[(999/1000)^x==.5, x] > > which *does* give solutions, in the form: > > {{x -> 692.801... }} > > Also, just curious, but how do you extract 'x' from the above? > Say I wanted to plug the above solution into another equation.. > In perl I'd say something like: > > y = Solve[(999/1000)^x == .5, x]; > > 3 * y->{x} # replaces with 692.81 > > etc. etc. > > but this doesn't seem to work. How do you access parts of a mathematica > datastructure/hash? > > And finally, how do you set values with the tty? ie: suppose my backspace > and > delete key aren't working with math.exe (they aren't) and I want them to > delete typos. In unix this would be stty erase ^H. In mathematica...? > > Thanks much for any help, > > Ed > >

**References**:**odd mathematica blindspot***From:*Edward Peschko <esp5@pge.com>