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Converge or diverge?

  1. Jul 27, 2008 #1
    (k^1/2)*(ln k )/(k^3 +1)
    how to prove it con or div?
    i tried comparison, limit comparison, etc... but just dont know how to prove it..
    please help...
     
  2. jcsd
  3. Jul 27, 2008 #2
    oh, from k=1 to +inf
     
  4. Jul 27, 2008 #3
    Hint: [itex]\ln{k} < k[/itex]. What comparisons have you tried? Try some more.
     
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