Double integral and reversing order

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SUMMARY

The discussion centers on solving a double integral problem involving the function tan−1(∏x)−tan−1(x) and its relation to the integral ∫^{g(x)}_{f(x)}h(y)dy. A key insight provided is the transformation of the numerator into the form ∫_x^{πx} (1/(1+t²)) dt, which simplifies the problem. This approach is crucial for reversing the order of integration effectively.

PREREQUISITES
  • Understanding of double integrals and their properties
  • Familiarity with the arctangent function and its derivatives
  • Knowledge of integration techniques, specifically definite integrals
  • Ability to manipulate limits of integration
NEXT STEPS
  • Study techniques for reversing the order of integration in double integrals
  • Learn about the properties of the arctangent function and its applications in calculus
  • Practice problems involving definite integrals and their transformations
  • Explore advanced integration techniques, including substitution and integration by parts
USEFUL FOR

Students studying calculus, particularly those tackling double integrals and integration techniques, as well as educators looking for problem-solving strategies in advanced mathematics.

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Homework Statement


http://img10.imageshack.us/img10/3390/55486934.jpg


Homework Equations


This is what I was thinking: tan−1(∏x)−tan−1(x)=∫^{g(x)}_{f(x)}h(y)dy


The Attempt at a Solution


I don't really understand how to do this question
 
Last edited by a moderator:
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Big hint. You can write the numerator as
\int_x^{\pi x} \frac{1}{1+t^2} dt
Now follow the rest of the problem suggestion.
 
Thanks for the hint!
 

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