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May 1st, 2010, 08:26 AM   #1
Joined: Apr 2010

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I hope to help

Let R be a ring with 1.

. Show that (_1)2 = 1 in R
JOANA is offline  
May 5th, 2010, 12:20 PM   #2
Joined: Mar 2010

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Re: I hope to help

Try adding (-1)1.
Martin Rattigan is offline  

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