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Even/odd case proof

  1. Apr 12, 2013 #1
    [itex]\forall[/itex] a,b,c [itex]\in[/itex] [itex]Z[/itex] a|bc [itex]\Rightarrow[/itex] a|b or a|c

    To prove this do I only need to show that 'a' can be either even or odd?
  2. jcsd
  3. Apr 12, 2013 #2


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    You can't prove it because it isn't true. Find a counterexample.
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