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Homework Help: Real Analysis: convergence and divergence

  1. Apr 13, 2010 #1
    1. The problem statement, all variables and given/known data
    Suppose [tex]\sum n[/tex] converges and an is greater than 0 for all n. Show that the sum of 1/an diverges.

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Apr 13, 2010 #2


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    I assume you mean Σan.

    What are your thoughts? What do you know about an? What have you tried?
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