Re: New user: Absproblem

*To*: mathgroup at smc.vnet.net*Subject*: [mg50124] Re: New user: Absproblem*From*: Bill Rowe <readnewsciv at earthlink.net>*Date*: Mon, 16 Aug 2004 06:45:30 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

On 8/15/04 at 3:14 AM, murray at math.umass.edu (Murray Eisenberg) wrote: >Yes, sometimes Mathematica cannot find (all) solutions. But in >this case, BELIEVE! Mathematica DID solve it: there are no >solutions! >You can see this, e.g., by graphing your piecewise-linear function: >Plot[x + 1 + Abs[2x - 4] + Abs[5 - x], {x, -10, 10}]; >Plot[x + 1 + Abs[2x - 4] + Abs[5 - x], {x, 0, 5}]; The original poster wrote >>I'm trying to solve this equation on Mathematica: >>x + 1 - |2x - 4| + |5 - x| = 0 You changed the sign of Abs[2 x -4] in your plot and yes, your version has no solution as you correctly showed. But there is a solution to the original problem even though Solve fails to find it. -- To reply via email subtract one hundred and four