Re: Problem with Mathematica driving me nuts

*To*: mathgroup at smc.vnet.net*Subject*: [mg46818] Re: [mg46791] Problem with Mathematica driving me nuts*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Tue, 9 Mar 2004 04:31:06 -0500 (EST)*Organization*: Mathematics & Statistics, Univ. of Mass./Amherst*References*: <200403080910.EAA10442@smc.vnet.net>*Reply-to*: murray at math.umass.edu*Sender*: owner-wri-mathgroup at wolfram.com

What version of Mathematica are you using (and on what hardware platform)? With Mathematica 5.0.0 under Windows XP on an Intel Pentium III, for both inputs I get the same result: 2. benwoodward.com wrote: > FindRoot[x^2 == 4x - 4, {x, 1}] > > Out[4]= > {x -> 1.99902} > > In[15]:= > FindRoot[x^2 - 4*x + 4, {x, 3}] > > Out[15]= > {x -> 2.00098} > > When the root is clearly two. > Is Mathematica using Newton's Method like a Ti-92? > Even if so, why wont it give a more accurate answer? > I've tried N[%,30] but it doesn't do anything. > I'm new to Mathematica coming over from a Ti-92, so everything is > frustrating right now. > Thanks. > > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305

**References**:**Problem with Mathematica driving me nuts***From:*bpw67deletethis@hotmail.com (benwoodward.com)