Sum of the convergent infinite series ln(n)/n^2

  • Thread starter mathgurl20
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  • #1

Homework Statement



Find the sum of the series: ln(n)/n^2 from n=1 to infinity.
I already know that it is convergent(at least i hope i am right on that fact)

Homework Equations





The Attempt at a Solution


I tried to use geometric series but i can't see anything like that that would work, and i can't see a way to use telescoping. And just starting with n=1 and summing numbers didn't seem to get me anywhere either.
 

Answers and Replies

  • #2
MathematicalPhysicist
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You still can use telescoping.
ln((n+1)^(1/(n+1)^2))-ln(n^(1/n^2)), use stolz theorem on this limit to get your answer, btw I am sure you know that but stolz theorem resembles L'hopital theorem.
 
  • #3
Thank you very much :)
 

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