Re: from Rumen, MEXICO, petition
- To: mathgroup at smc.vnet.net
- Subject: [mg118065] Re: from Rumen, MEXICO, petition
- From: Barrie Stokes <Barrie.Stokes at newcastle.edu.au>
- Date: Mon, 11 Apr 2011 07:06:23 -0400 (EDT)
Hi Rumen
The results from
expression =
11*Exp[-Es/135] + 10.5*Exp[-Es/425] + 4.899*Exp[-Es/1754] + 2.02912;
Plot[ expression, {Es, 0, 10000}, PlotRange -> {All, {-10, All} },
Epilog -> {Line[ {{0, 0}, {10000, 0}} ]}]
Limit[ expression, Es -> \[Infinity] ]
and casual inspection suggest that this expression is never zero?
Cheers
Barrie
>>> On 09/04/2011 at 9:11 pm, in message <201104091111.HAA09139 at smc.vnet.net>,
Rumen Ivanov <rumen5252 at yahoo.com.mx> wrote:
> Hello,
>
> 11*Exp[-Es/135]+10.5*Exp[-Es/425]+
> 4.899*Exp[-Es/1754]+ 2.02912 = 0
> Please tell me how Mathematica can solve this equation
> for Es? With the derivatives of "Solve" it is impossible.
>
> Best
>
> Regards,
>
> Rumen
>
> Prof. Dr. Rumen Ivanov Tsonchev
> Facultad de F=EDsica
> Universidad Aut=F3noma de Zacatecas
> e-mail=B4s:
> rumen5252 at yahoo.com.mx
> rumen at fisica.uaz.edu.mx