RSolve

*To*: mathgroup at smc.vnet.net*Subject*: [mg35140] RSolve*From*: Matthias.Bode at oppenheim.de*Date*: Tue, 25 Jun 2002 19:55:31 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hello Andrew, straight from the Help Browser: 1.) y = a, t = n. 2.) Input: RSolve[a[n + 2] - 2*a[n + 1] + 3*a[1] == 4, a[n], n] 3.) Output: {{a[n] -> If[n >= 1, n 2 (-2 + 2 ) - n (-3 + 2 ) C[1], 0]}} Simple, isn't it? Best regards, Matthias Bode. I'm new to Mathematica and am having trouble with inputting the equations I'm looking to solve. I know the basic input of RSolve, but can't quite get it. Here's a sample problem, if anyone could show me how to input into RSolve I can probably run with the ball after that. y(t+2) - 2Y(t+1) + 3Y(1) = 4 With the part in brackets being a subscript denoting time. I know it sounds dumb, but I just don't know the input notatin well enough to get a problem typed in correctly, and the Mathematica book is a little overwhelming. Any help greatly appreciated! Andrew