Determine convergence of series using integral test

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SUMMARY

The discussion focuses on determining the convergence of the series ∑ (n=1 to ∞) n/(n^4+1) using the Integral Test. The initial transformation of the series into the form 1/2(2x)/(1+(x^2)^2) is highlighted as a crucial step, simplifying the integration process. The integral ∫ dy/(1 + y²) is identified as straightforward, facilitating the evaluation of convergence. This method effectively demonstrates the application of the Integral Test in series analysis.

PREREQUISITES
  • Understanding of series convergence and divergence
  • Familiarity with the Integral Test for series
  • Basic knowledge of integration techniques
  • Experience with manipulating algebraic expressions
NEXT STEPS
  • Study the Integral Test for series convergence in detail
  • Learn about improper integrals and their applications
  • Explore examples of series that converge and diverge
  • Practice transforming series into integrable forms for analysis
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Students studying calculus, mathematicians analyzing series, and educators teaching convergence tests will benefit from this discussion.

lha08
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Homework Statement


How can i find if the following series is convergent or divergent using the INTEGRAL TEST?
sigma (n=1 to infinity)= n/(n^4+1)


Homework Equations





The Attempt at a Solution


The answer says that the initial step involves changing it to: 1/2(2x)/(1+(x^2)^2)..but why is that?
 
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Hi lha08! :smile:

(try using the X2 tag just above the Reply box :wink:)
lha08 said:
sigma (n=1 to infinity)= n/(n^4+1)

The answer says that the initial step involves changing it to: 1/2(2x)/(1+(x^2)^2)..but why is that?

Because ∫dy/(1 + y2) is easy. :wink:
 

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