Partial Fractions: Refresh Memory on Integral of x/(1+x^2)

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SUMMARY

The integral of x/(1+x^2) is best solved using substitution rather than partial fractions. The substitution u = 1+x^2 simplifies the integral effectively. Partial fractions are not applicable in this case because the polynomial 1+x^2 is irreducible over the reals, making it impossible to decompose into simpler fractions.

PREREQUISITES
  • Understanding of integral calculus
  • Familiarity with substitution methods in integration
  • Knowledge of polynomial irreducibility
  • Basic concepts of partial fraction decomposition
NEXT STEPS
  • Study the method of substitution in integral calculus
  • Learn about polynomial irreducibility and its implications in integration
  • Explore examples of partial fraction decomposition for reducible polynomials
  • Practice solving integrals involving rational functions
USEFUL FOR

Students studying calculus, particularly those focusing on integration techniques, as well as educators looking to clarify the application of substitution versus partial fractions.

dlevanchuk
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Homework Statement


Need to refresh my memory :-S

Indefinite integral of x/(1+x^2) ..


Homework Equations





The Attempt at a Solution



Would I use partial fractions on that bad boy?
 
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nevermind... substitution of u = 1+x^2 is easier.. :-)
 
Partial fractions is not a viable candidate for this problem, since 1 + x2 is irreducible in polynomials with real coefficients.
 

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