Re: Re: New user: Abs[] problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg50100] Re: Re: [mg50079] New user: Abs[] problem*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Sun, 15 Aug 2004 03:14:26 -0400 (EDT)*Reply-to*: hanlonr at cox.net*Sender*: owner-wri-mathgroup at wolfram.com

You get a complete result with Reduce eqn=x+1-Abs[2x-4]+Abs[5-x]==0; Reduce[eqn,x] x == -1 || Re[x] >= 5 && Im[x] == 0 Reduce[eqn,x, Reals] x == -1 || x >= 5 Plot[x+1-Abs[2x-4]+Abs[5-x],{x,-2,8}, PlotRange->All, PlotStyle->RGBColor[1, 0, 0]]; Bob Hanlon > > From: Bob Hanlon <hanlonr at cox.net> To: mathgroup at smc.vnet.net > Date: 2004/08/14 Sat AM 09:54:33 EDT > To: <Edson.Brusque at smc.vnet.net>, <mathgroup at smc.vnet.net> > Subject: [mg50100] Re: [mg50079] New user: Abs[] problem > > eqn=x+1-Abs[2x-4]+Abs[5-x]==0; > > FindRoot[eqn,{x,2}] > > {x -> 5.} > > eqn /. % > > True > > > Bob Hanlon > > > > > From: Edson.Brusque at smc.vnet.net To: mathgroup at smc.vnet.net > > Date: 2004/08/14 Sat AM 01:50:33 EDT > > To: mathgroup at smc.vnet.net > > Subject: [mg50100] [mg50079] New user: Abs[] problem > > > > Hello, > > > > I'm starting Electrical Engineering and using Mathematica for > > helping me in Calculus e Algebra studies. > > > > I'm trying to solve this equation on Mathematica: > > x + 1 - |2x - 4| + |5 - x| = 0 > > > > on the Math* notebook I'm typing: > > Solve[x + 1 - Abs[2x - 4] + Abs[5 - x] == 0,x] > > > > but only got an empty output: {{}} > > > > Someone please can help me get Math* to solve this? > > > > Thank you very much, > > > > Edson Brusque > > > > > ----------------------------------------------------------------- > ---- > > Edson Brusque C.I.Tronics Lighting Designers Ltda > > Research and Development Blumenau - SC - Brazil > > http://www.suporte.ind.br/ryan/netiqueta.htm www.citronics.com.br > > > ----------------------------------------------------------------- > ---- > > > > > > > > > Bob Hanlon Chantilly, VA