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Determine all the accumulation point.

  1. Oct 4, 2011 #1
    I've faced with some problem in Math. Analysis books of Tom Apostol,
    For example, (-1)n+ 1/m, n,m=1,2,3,4,5....

    i think there is no accumulation point but how should i prove this?

    thanks for your helps...
     
  2. jcsd
  3. Oct 4, 2011 #2

    mathman

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    Science Advisor

    Since the 1/m term -> 0, -1 and 1 are accumulation points.
     
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