Converting Integral into Power Series: Is This Step Valid?

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SUMMARY

The discussion focuses on the validity of converting the integral \(\int \frac{arctan(t)}{t} dt\) into a power series representation. The proposed transformation involves rewriting the integral as \(\int \frac{1}{t} \int \frac{dy}{1-(-y^2)} dt\), which is confirmed as a valid step by participants. The context is limited to the interval \(0 < t < x\), ensuring the convergence of the series. This conversion is essential for further analysis in calculus and series expansion.

PREREQUISITES
  • Understanding of integral calculus, specifically improper integrals.
  • Familiarity with power series and their convergence criteria.
  • Knowledge of the arctangent function and its properties.
  • Basic skills in manipulating double integrals and changing the order of integration.
NEXT STEPS
  • Study the convergence of power series, particularly for functions like arctangent.
  • Learn about the Taylor series expansion of the arctangent function.
  • Explore techniques for changing the order of integration in double integrals.
  • Investigate applications of power series in solving differential equations.
USEFUL FOR

Students and educators in calculus, mathematicians interested in series expansions, and anyone studying integral transformations in mathematical analysis.

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Homework Statement



Hi, we're supposed to put the following integral into a power series:

[tex]\int \frac{arctan(t)}{t} dt[/tex]

with 0 < t < x.

Homework Equations



n/a

The Attempt at a Solution



I just want to know whether this step is ok.

[tex]\int \frac{arctan(t)}{t} dt = \int \frac{1}{t} \int \frac{dy}{1-(-y^2)} dt[/tex]

with 0 < y < t and 0 < t < x

Happy Easter!
 
Last edited:
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I agree with it.
 

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