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MathGroup Archive 2004

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Re: Re: how can I solve a function Erfc

  • To: mathgroup at smc.vnet.net
  • Subject: [mg48440] Re: [mg48420] Re: how can I solve a function Erfc
  • From: DrBob <drbob at bigfoot.com>
  • Date: Sun, 30 May 2004 06:12:02 -0400 (EDT)
  • References: <c96h2m$idk$1@smc.vnet.net> <200405290706.DAA20369@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

If only that worked! But it doesn't... at least, not in version 5.0.1.

Bobby

On Sat, 29 May 2004 03:06:40 -0400 (EDT), Jens-Peer Kuska <kuska at informatik.uni-leipzig.de> wrote:

> Hi,
>
>
> Plot[Evaluate[
>     t /. Solve[Erfc[L/(4*(Dg*t)^(1/2))] == 9/10, t][[1]] /. Dg ->
> 5*10^5],
>     {L, 0, 10}]
>
> Regards
>   Jens
>
> aude wrote:
>>
>> Hi,
>>
>> I have to solve this function:
>>
>> Erfc[L/(4*(Dg*t)^(1/2))]= 0.9
>>
>> Dg is constant.
>>
>> Dg=5*10^5
>>
>> I want to plot t as a function of L.
>>
>> thanks.
>>
>> aude
>
>



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