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Re: Problem with Mathematica driving me nuts


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
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University of Massachusetts                413 545-2859 (W)
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Amherst, MA 01003-9305


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