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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.
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