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Abstract algebra help

  1. Nov 30, 2011 #1
    Pick a number n which is the product of 2 distinct primes 5 or more. Find the number of elements of each order in the groupd D(sub)n+Z(sub)9, completely explaining your work. Verify that these number add up to the order of the group.

    Ive used 7 and 11 as my primes. So now do I use these primes in D_n since to where i get D_7+Z_9 and D_11+Z_9? This is where im confused.
     
  2. jcsd
  3. Nov 30, 2011 #2
    Also once i have that info, then where do i go from here?
     
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