Absolute convergence of series

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SUMMARY

The discussion focuses on the absolute convergence of the series defined by the summation ##\sum_{n = 1}^\infty \frac{(-1)^{n + 1}}{n + \ln(n)}##. The limit comparison test is utilized to analyze the series, concluding that since the harmonic series diverges, the series in question also diverges. Participants emphasize the importance of using proper LaTeX formatting for clarity in mathematical expressions.

PREREQUISITES
  • Understanding of series convergence concepts
  • Familiarity with the limit comparison test
  • Knowledge of harmonic series properties
  • Basic proficiency in LaTeX for mathematical notation
NEXT STEPS
  • Study the properties of the harmonic series in detail
  • Learn about the limit comparison test and its applications
  • Explore other convergence tests such as the ratio test and root test
  • Practice using LaTeX for mathematical expressions and formatting
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Students studying calculus, mathematicians analyzing series convergence, and educators teaching mathematical notation and convergence tests.

Kqwert
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Homework Statement


Hello, I need some feedback on whether this reasons is correct.

consider the series
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Examine the series for absolute convergence.

Homework Equations

The Attempt at a Solution


How I have solved this, using the limit comparison test:

we have:

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introducing

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we have that
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We know that bn diverges (harmonic series) , and we can therefore conclude that also an diverges. True?
 

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Yes. That is correct.
 
@Kqwert, instead of posting a bunch of image attachments, why don't you take 5 minutes and look at our LaTeX tutorial (https://www.physicsforums.com/help/latexhelp/)?
The first summation in your post is ##\sum_{n = 1}^\infty \frac{(-1)^{n + 1}}{n + \ln(n)}##

The MathJax markup I used above is ##\sum_{n = 1}^\infty \frac{(-1)^{n + 1}{n + \ln(n)}##
 
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