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MathGroup Archive 2004

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Re: Remove the higher order terms in series expansion

  • To: mathgroup at smc.vnet.net
  • Subject: [mg52849] Re: Remove the higher order terms in series expansion
  • From: Bill Rowe <readnewsciv at earthlink.net>
  • Date: Tue, 14 Dec 2004 06:00:28 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

On 12/13/04 at 4:23 AM, highorder at Noreply.com (highorder) wrote:

>I guess this should be simple and hiding somewhere in the manual.
>Is there a quick way to remove the high order terms after using
>Series[f,{x,x0,n}] command? The problem comes from the output is
>actually given by:

>expansion term + O(x^3);

>the O(x^3) should be removed. I will keep trying but wondering if
>anyone has a quick answer.

Use Normal, i.e.,

In[9]:= Normal[Series[Exp[x], {x, 0, 3}]]
Out[9]= x^3/6 + x^2/2 + x + 1
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