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Homework Help: Permutation 2

  1. Dec 1, 2004 #1
    Prove: a group of even order must have an even number of elements of order 2
     
  2. jcsd
  3. Dec 1, 2004 #2

    Hurkyl

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    What group do they generate?

    (You sure on that? What about Z_2?)
     
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