Re: calculate Recurrence Equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg68762] Re: calculate Recurrence Equations*From*: "Dana" <ddelouis at bellsouth.net>*Date*: Fri, 18 Aug 2006 03:12:07 -0400 (EDT)*References*: <ec1a1u$omo$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi. I believe the syntax of your equations are a little off. This worked for me... In[1]:= equ = { v[0] == 1, v[n] == v[n - 1] + (v[n - 1]*5 - 1)/100 } ; In[2]:= RSolve[equ, v[n], n] Out[2]= {{v[n] -> (1/5)*(1 + 4^(1 - n)*(21/5)^n)}} -- HTH. :>) Dana DeLouis Mathematica 5.2 "Frank Hechtner" <frank.hechtner at rub.de> wrote in message news:ec1a1u$omo$1 at smc.vnet.net... > hi, > > i?m in trouble with my Recurrence Equations: > > i?ve defined the following function > > anteil[0] = 1 > anteil[n_] := anteil[n - 1] + (anteil[n - 1]*5 - 1)/100 > > i want mathematica to calculate the values for anteil[30] and so on. > > Unfortunately mathematica needs for this calculation over 2 hours (and > is still running, athlon x2 4600, 2 gb ram). > > I don?t see where are the difficulties for mathematica... > > Thanx for your help > > frank >