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__"A Course of Pure Mathematics"__and there is one problem I'm really stuck on. I'm wondering if anyone could help me out. To avoid typing it all out, I here's a link. http://books.google.com/books?id=a3...a=X&oi=book_result&resnum=1&ct=result#PPA7,M1

Here's the problem taken out of context. It's 6 and page 7.

Show that if P

_{n}= 1 and p

_{1}+p

_{2}+...+p

_{n}[tex]\neq[/tex] -1, then p

_{1}x

^{n}+p

_{2}x

^{n-1}+p

_{3}x

^{n-2}+...+p

_{n}= 0 can not have a rational root.

I apologize if I put this in the wrong section.