*To*: mathgroup@smc.vnet.net*Subject*: [mg11184] Re: Possible bug in FindRoot[] in Mathematica 3.0*From*: Bill Bertram <wkb@ansto.gov.au>*Date*: Wed, 25 Feb 1998 03:31:53 -0500*Organization*: ANSTO*References*: <6ctg2d$lk5@smc.vnet.net>

Adrian Cable wrote: > > Hi there, > I think I've possibly found a bug in Mathematica 3.0. Consider the > equation: > This looks like a bug to me. Or am I just missing something here? > Yes you are missing something, namely that the root you get depends on your initial guess. With your initial value of x = 0, Mathematica tries to converge on the "root" at x -> -Infinity. (which also satisfies your equation). You can get the other root by telling Mathematica to start at some x > 0 eg {x,0.5} Cheers , Bill