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Why is this proof wrong?

  1. Apr 10, 2014 #1
    1. The problem statement, all variables and given/known data

    DHr1pk7.png

    2. Relevant equations



    3. The attempt at a solution

    DN0L8qY.png

    Why can't C={a1}?
     
  2. jcsd
  3. Apr 10, 2014 #2

    AlephZero

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    Science Advisor
    Homework Helper

    Which part of
    don't you understand?
     
  4. Apr 12, 2014 #3
    The proof clearly falls apart when it is stated let Set ##A## be a set of ##k+1## numbers. These number can either be all the same, or different. Hence the proof is invalid from that point on.
     
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