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Math Forum » Discussions » Math Topics » alt.math.undergrad.independent

Topic: Help with limit problem?
Replies: 12   Last Post: Sep 15, 2007 11:09 PM

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Hanford Carr

Posts: 25
Registered: 11/17/05
Re: Help with limit problem?
Posted: Sep 12, 2007 10:33 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

me@privacy.net wrote:
>
> "Brian M. Scott" <b.scott@csuohio.edu> wrote:
>
> > (As Arturo has
> >already pointed out, x - 1 is such a factor.)
>
> Ok
>
> But for some weird reason I can't see how (x-1) factors
> out of both polynomials. My brain just quit working on
> that

x^n - 1 = (x-1)(x^(n-1) + x^(n-2)+ ... + x + 1)

i.e. x^5 - 1 = (x-1)(x^4 + x^3 + x^2 + x + 1)

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