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Solving a Sum

  • To: mathgroup at smc.vnet.net
  • Subject: [mg89875] Solving a Sum
  • From: Igor <pischek at gmx.net>
  • Date: Mon, 23 Jun 2008 02:49:17 -0400 (EDT)

Hi All!

I just started using mathematica for university and encounter the following issue which I am not able to figure out myself.

I have to equations:

eq1:=Sum[(Subscript[z,t]+Subscript[c,t]*Subscript[c,0])*q^(-t),{t,1,T}]==Subscript[z,0]+Sum[Subscript[z,t]*q^(-t),{t,1,T}]

and

eq2:=Subscript[z,t]==Subscript[s,t]*u

I would like to solve these equations for c_t but get the following error message when using the Solve command as follows:

Solve[{eq1, eq2}, Subscript[c, t]]

Solve::tdep: The equations appear to involve the variables to be solved for in an essentially non-algebraic way. >>

How can I solve this problem?


Thanks a lot!
Igor


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