RE: help: rewriting a fraction a/b==c/d + e/f
- To: mathgroup at smc.vnet.net
- Subject: [mg31012] RE: [mg31000] help: rewriting a fraction a/b==c/d + e/f
- From: "David Park" <djmp at earthlink.net>
- Date: Tue, 2 Oct 2001 01:20:47 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Okke, Use Apart. 1/((x - 1)(x^2 + x + 1)) // Apart 1/(3*(-1 + x)) + (-2 - x)/(3*(1 + x + x^2)) If you are new to Mathematica, it will probably be worth your while to work through as much of Part I of the Mathematica Book as seems relevant to you. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ > From: Okke [mailto:kroosu at tref.nl] To: mathgroup at smc.vnet.net > > hello, > i'm trying the mathematica demo by doing some basic mathematics. > now i'm stuck at rewritting a fraction. > could somebody please help me by telling me how to rewrite: > > 1/((x-1)(x^2+x+1)) to A/(x-1) + (Bx+C)/(x^2+x+1) > or do i have to do that manualy? > and can mathematica find the values for A, B and C ? > Solve[eqn1==eq2,{A}] doesnt solve the problem, and subsituting > x with 1 doesnt either. > > tia, > -- > Okke <kroosu at tref.nl> >