Re: how do you solve a less-or-equal equation

*To*: mathgroup at smc.vnet.net*Subject*: [mg31016] Re: how do you solve a less-or-equal equation*From*: "Steve Luttrell" <luttrell at signal.qinetiq.com>*Date*: Tue, 2 Oct 2001 01:20:52 -0400 (EDT)*Organization*: Defence Evaluation & Research Agency*References*: <9p93fj$ocl$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

"Okke" <kroosu at tref.nl> wrote in message news:9p93fj$ocl$1 at smc.vnet.net... > 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? Here is an example of what you want to do: 1. Read in the Algebra`InequalitySolve` package: <<Algebra`InequalitySolve` 2. Solve an inequaility: InequalitySolve[x^2+x\[LessEqual]4x-1,x] which produces the output (1/2)*(3 - Sqrt[5]) <= x <= (1/2)*(3 + Sqrt[5]) -- Steve Luttrell QinetiQ, Malvern, U.K.