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anImaru
United States106 Posts
![[image loading]](http://i35.tinypic.com/295bqcp.jpg) Well I can find the differential equation for x0(t) and solve it easily enough. However, doing it for an arbitrary subsequent tank, let's say xn(t) is where I am stuck. Cant seem to be able to solve for xn(t) without having x(n-1)(t) in there... Edit: Got the solution. Thanks to everyone who gave some meaningful input.  | ||
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conCentrate9
United States438 Posts
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Grobyc
Canada18410 Posts
On September 22 2008 13:47 conCentrate9 wrote: ... EDIT: seriously though, why do so many people come to TL for homework help. if you don't understand the work ask get help from your professor/teacher at school. thats what they are getting paid for.. | ||
micronesia
United States24772 Posts
BTW the topic here is modeling, which you neglected to even mention. At least you told us that it's diffeqs! | ||
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fight_or_flight
United States3988 Posts
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anImaru
United States106 Posts
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economist_
Vietnam719 Posts
On September 22 2008 13:53 Grobyc wrote: EDIT: seriously though, why do so many people come to TL for homework help. if you don't understand the work ask get help from your professor/teacher at school. thats what they are getting paid for.. Some of them are damn like piece of cake. Probably they want from us the superb outstanding solution that would surprise their teachers/professors  | ||
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Cascade
Australia5405 Posts
On September 22 2008 14:09 fight_or_flight wrote: I guess you should try to find an equation for the concentration of liquid B in the first tank as a function of time. Once you have that, I think you can use your previous result for each successive tank. This is the easiest aproach and works in principle. not sure how complicated the calculations gets as you go on. Otherwise it seems like the kind of problem that you should solve as simultaneous differential equations. That is, you put up your system of linear differential equations, and then you use the machinery with matrices where you find eigenvectors, eignevalues etc and then exponentiate to find solution. If your course doesnt cover that, i reccomend the first solution.  | ||
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