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Re: steady state concetration
Posted:
Jan 31, 2013 8:45 PM


On Wed, 30 Jan 2013 20:05:12 0700, jeremy <j.witoslawska@gmail.com> wrote:
> Hi, > i'm new in Mathematica and i've a project to do. i've to find at what > time 90% of the steady state concetration of C is achieved. and soo far > i have something like that, for 3 different k values: > > With[{k = 0.3}, eqn1s = 0 == k (1/2  z[t]) (1/3  z[t])]; > With[{k = 0.6}, eqn2s = 0 == k (1/2  z[t]) (1/3  z[t])]; > With[{k = 0.9}, eqn3s = 0 == k (1/2  z[t]) (1/3  z[t])]; > Evalute[{eqn1s, eqn2s, eqn3s}] > NSolve[Evaluate[{eqn1s, eqn2s, eqn3s}], z[t]] > > and what i get in NSolve is supposedly be the steady state, but i don't > know how to find this 90% and my profesor told me that i could try do > this with DSolve, but something doesn't work. i hope that someone will > be able to help me with this. > > Thanks >
The purpose of this list isn't that of solving people's homework problems for them.
If your professor wanted someone to tell you how to work the problem, don't you think *he* would've told you how to work it?
 Louis A. Talman Department of Mathematical and Computer Sciences Metropolitan State University of Denver
<http://rowdy.msudenver.edu/~talmanl>



