Hi - Try this for a start (on the expression with the logs):
logexpand:true;
solve(log(a*x)-C*log(b*x),x);
I have not yet found anything similar for exponentials...
Dave Holmgren
Dr. David E. Holmgren,
Imaging Scientist,
SMART Technologies, Inc.
Calgary, AB, Canada
http://www.smarttech.com
[403]-235-1452, ext. 251
DavidHolmgren@smarttech.com
> -----Original Message-----
> From: Daniel Lemire [SMTP:lemire at ondelette]
> Sent: Monday, October 01, 2001 5:12 PM
> To: maxima@www.ma.utexas.edu
> Subject: [Maxima] Newbie: problem solving basic equations
>
> Good day,
>
> I think the "solve" function is broken. I just installed Maxima and
> tried solving a few elementary equations. In all cases but the very,
> very elementary ones, Maxima is no good, it seems. (See below.)
>
>
> What am I missing? Surely, Maxima can do this?
>
> [lemire@romeo lemire]$ maxima
> GCL (GNU Common Lisp) Version(2.4.0) Wed May 9 12:02:00 CDT 2001
> Licensed under GNU Library General Public License
> Contains Enhancements by W. Schelter
> Maxima 5.6 Wed May 9 12:01:49 CDT 2001 (with enhancements by W. Schelter).
> Licensed under the GNU Public License (see file COPYING)
> (C1) solve(exp(a*x)= C*exp(b*x),x);
>
> a x
> b x %E
> (D1) [%E = -----]
> C
> (C2) solve(log(a*x)=C*log(b*x),x);
>
> LOG(a x)
> (D2) [LOG(b x) = --------]
> C
> (C3) solve(a^x=b^x,x);
>
> x x
> (D3) [b = a ]
> (C4) solve(m*x+b=y,x);
>
> y - b
> (D4) [x = -----]
> m
> (C5)
> --
> Daniel Lemire, Ph.D.
>
> http://www.ondelette.com/
>
>
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