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Homework Help: Multiplicative Inverse proof

  1. Sep 23, 2010 #1
    1. The problem statement, all variables and given/known data
    Show that if and [c] are multiplicative inverses of [a] in [tex]Z_{n}[/tex], then b[tex]\equiv[/tex]c mod n.

    2. Relevant equations

    3. The attempt at a solution
    I'm totally confused on this.
  2. jcsd
  3. Sep 23, 2010 #2
    [a]=1 and [a][c]=1, right?
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