No, but
sage: t = var("t")
sage: a = lambda t: 0.004*(8*exp(-300*t) -
8*exp(-1200*t))*720000*exp(-300*t) - 0.1
sage: attach
'/home/wdj/sagestuff/sage-2.8.9.rc1/examples/calculus/newton_raphson.sage'
sage: newton_raphson(a,0.01,0.000001,0.00001)
0.0205789829857519
works okay. (This newton_raphson is not the same one as implemented in SAGE
but is comes with SAGE in the calculus examples subdirectory.) Maybe Maxima
just can't solve that equation?
On Nov 20, 2007 3:28 PM, Ted Kosan <[EMAIL PROTECTED]> wrote:
>
> Does anyone have any thoughts on why the solve() function this program
> returns an empty list?:
>
> sage: var('t')
> sage: a = .004*(8*e^(-(300*t)) - 8*e^(-(1200*t)))*(720000*e^(-(300*t))
> - 11520000*e^(-(1200*t))) +.004*(9600*e^(-(1200*t)) -
> 2400*e^(-(300*t)))^2
> sage: print a(t=.000411)
> sage: show(plot(a,0,.002),xmin=0, xmax=.002)
> sage: solve(a==0,t)
>
>
> And why the solve() function in this program hangs?:
>
> sage: var('t')
> sage: v = 0.004*(9600*e^(-(1200*t)) - 2400*e^(-(300*t)))
> sage: show(plot(v,0,.002),xmin=0,xmax = .002)
> sage: solve(v == 0,t)
>
>
> Thanks in advance,
>
> Ted
>
> >
>
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/
-~----------~----~----~----~------~----~------~--~---
