Irreducible in Z[x]: (x-a1)(x-a2)....(x-an)+1

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Homework Help Overview

The discussion revolves around the irreducibility of the polynomial (x-a1)(x-a2)....(x-an)+1 in Z[x], where a1, a2, ..., an are distinct odd integers. Participants are examining the validity of the original statement regarding the polynomial's properties.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to apply the Eisenstein criterion but expresses difficulty in doing so. Some participants question the truth of the irreducibility claim and request counterexamples to support their position.

Discussion Status

The discussion is active, with participants exploring the claim's validity. There is a suggestion that the polynomial may not be irreducible, and counterexamples are being sought to illustrate this point.

Contextual Notes

Participants are focused on the specific case of distinct odd integers and the implications of this choice on the polynomial's irreducibility. There is an underlying assumption that the original statement may not hold true, prompting further investigation.

sayan2009
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Homework Statement



show that the polynomial (x-a1)(x-a2)....(x-an)+1 is irreducible in Z[x],where a1,a2,...an are distinct odd integers

Homework Equations


The Attempt at a Solution

trying to use eisenstein criterion...but cant
 
Last edited:
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That statement isn't true.
 
give anr coutrexmple
 
sayan2009 said:
give anr coutrexmple

(x-1)(x-3)+1=x^2-4x+4=(x-2)^2
 

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