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Re: how can I solve a function Erfc


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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