Help with integration, involving integration by partial fractions.

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Homework Help Overview

The problem involves integrating the rational function (3x^2-4)/(x^3-4x-6), with a focus on integration techniques, particularly integration by partial fractions and substitution.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to consider integration by parts but questions how to set it up. They note the relationship between the degrees of the numerator and denominator and express difficulty in factoring the denominator. Some participants suggest using a u substitution, pointing out that the numerator may relate to the derivative of the denominator.

Discussion Status

Participants are exploring different integration techniques, with some guidance offered regarding substitution. There is acknowledgment of the original poster's oversight in considering substitution, but no explicit consensus on the best approach has been reached.

Contextual Notes

There is a mention of the original poster's struggle with factoring and the implications of the problem's setup, but no specific constraints or rules are noted.

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Homework Statement



(3x^2-4)/(x^3-4x-6)

Homework Equations



I guess integration by parts... But how do i set this up?

The Attempt at a Solution



The numerator is exponentially lower than the denominator, so no long division.
The denominator seems not to factor out into anything... I tried doing a perfect squares situation, by factoring x out of the first two terms, but to no avail... Am I doing something wrong?
 
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Try a u substitution u=x^3-4*x-6. Numerator look familiar?
 
Last edited:
Wow, I'm an idiot... hahaha... Too busy trying my new integration skills and forgot substitution.
 
Substitution is one of the first techniques you learn, and is one of the simplest to use. So that should be one that you think about using first. Even if it's not applicable, you haven't wasted that much time.
 

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