Re: Problem with Mathematica driving me nuts
- To: mathgroup at smc.vnet.net
- Subject: [mg46793] Re: Problem with Mathematica driving me nuts
- From: "Graham Michalk" <gmichalk at optushome.com.au>
- Date: Tue, 9 Mar 2004 04:30:38 -0500 (EST)
- References: <c2he1m$ahd$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Ben,
Mathematica 4.2 delivers your results.
Mathematica 5.0.0 delivers, in both cases:
{x -> 2.}
Graham M
"benwoodward.com" <bpw67deletethis at hotmail.com> wrote in message
news:c2he1m$ahd$1 at smc.vnet.net...
> 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.
>