Re: is this solvable?

*To*: mathgroup at smc.vnet.net*Subject*: [mg56598] Re: [mg56585] is this solvable?*From*: "Jaccard Florian" <Florian.Jaccard at he-arc.ch>*Date*: Sat, 30 Apr 2005 01:27:07 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

As you have two searched functions a[t] and b[t], you should have 2 differential equations. Let us say you have a equation2 you just forgotten to give us. Then the correct way to obtain a symbolic solution is : DSolve[{a'[t] + b'[t] == (-p1)*a[t] - p2*b[t], equation2, a[0] == a0, b[0] == b0}, {a[t], b[t]}, t] Regards F.Jaccard -----Message d'origine----- De : ames_kin at yahoo.com [mailto:ames_kin at yahoo.com] Envoyé : vendredi, 29. avril 2005 09:22 À : mathgroup at smc.vnet.net Objet : [mg56585] is this solvable? a'[t] + b'[t]== -p1 a[t] - p2 b[t] where {a[0]== a0, b[0]== b0} is this solvable in Mathematica? If so, how will I go about doing so? let's assume a[0]== a0, and b[0]==b0 if symbolic solution isn't possible, then intial conditions of a[0]== 1, and b[0]==0.5 couild be used...(or any other numbers for that matter) thanks in advance.