Prove that Un is a group with respect to multiplication.
For an integer n > 1, let G = Un, the group of units in Zn; that is, the set of all [a] in Zn that have multiplicative inverses. Prove that Un is a group with respect to multiplication.
Last edited by MissMousey; May 2nd 2010 at 04:36 PM.
For an integer n > 1, let G = Un, the group of units in Zn; that is, the set of all [a] in Zn that have multiplicative inverses. Prove that Un is a group with respect to multiplication.
I mean, what's the problem? Maybe the following will help you