RE: help: how do you solve a less-or-equal equation
- To: mathgroup at smc.vnet.net
- Subject: [mg31011] RE: [mg31001] help: how do you solve a less-or-equal equation
- From: "David Park" <djmp at earthlink.net>
- Date: Tue, 2 Oct 2001 01:20:46 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Okke, Needs["Algebra`InequalitySolve`"] InequalitySolve[3*x^2 + 2*x + 1 <= 2*x + 5, x] -(2/Sqrt[3]) <= x <= 2/Sqrt[3] You will get False is there are no solutions. Sometimes you will get Root objects. Look them up in Help. InequalitySolve[-5*x^3 - 3*x^2 + 2*x + 1 <= 2*x + 5, x] N[%] x >= Root[4 + 3*#1^2 + 5*#1^3 & , 1] x >= -1.1772423815220807 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. > > at the moment i'm having problems with a less-or-equal equation. > Solve[a <= b,x] (with a and b as functions of x) gives an error, > saying it's not a well-formed equation. > appearently Solve cant handle the less-than sign. > how do you solve an equation like this in mathematica? > > and can i assign the value to the variable automaticly? > > tia, > -- > Okke <kroosu at tref.nl> >