Absolute Convergence Tests for Series with Arctan and Alternating Signs

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SUMMARY

The forum discussion focuses on the absolute convergence tests for the series defined by the sum from n = 1 to infinity of ((-1)^n)arctan(n)/(n^2). Participants suggest using either the ratio test or the absolute convergence test to analyze the series. The arctan(n) function is noted to be bounded, leading to a comparison with a p-series for further evaluation. The discussion emphasizes the importance of understanding these convergence tests in the context of alternating series.

PREREQUISITES
  • Understanding of series convergence tests, specifically the ratio test and absolute convergence test.
  • Familiarity with the arctan function and its properties.
  • Knowledge of p-series and their convergence criteria.
  • Basic calculus concepts, including limits and series summation.
NEXT STEPS
  • Study the application of the ratio test in detail, particularly for alternating series.
  • Explore the properties of the arctan function and its behavior as n approaches infinity.
  • Review p-series convergence criteria and how they relate to bounded functions.
  • Practice solving problems involving absolute convergence tests for various series.
USEFUL FOR

This discussion is beneficial for mathematics students, educators, and anyone studying series convergence, particularly in calculus or advanced mathematics courses.

vigintitres
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Homework Statement



so this one says the sum of the series starting at n = 1 to inf. of ((-1)^n)arctan(n)/(n^2)


Homework Equations



Either a ratio test or just an abs. conv. test

The Attempt at a Solution



not sure how to play this one out, honestly. I see some semblance of hope shimmering there but I am not strong enough to reach for it... *tear
 
Physics news on Phys.org
Go for absolute convergence. |arctan(n)| is bounded, right? Compare it with a p-series.
 

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