Integration using partial fractions.

Thread starter physicsbro
Start date Nov 30, 2009
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Fractions Integration Partial Partial fractions

In summary, integration using partial fractions is a method used to solve integrals that cannot be easily evaluated using traditional methods. It involves breaking down a complex fraction into simpler fractions, called partial fractions, and then integrating each term separately. This method is commonly used when the integrand is a rational function or contains a factor that can be factored into linear or quadratic terms. To determine the partial fractions, the numerator and denominator of the rational function are factored and the coefficients of the fractions are solved using algebraic methods. There are rules for determining the coefficients, such as using a system of equations for repeated linear or quadratic factors. The steps for integrating using partial fractions include factoring, writing fractions, determining coefficients, integrating each term, and simpl

Nov 30, 2009

physicsbro

Homework Statement

I need to integrate this using partial fractions. "b/(x^2-a^2)"

Homework Equations

The Attempt at a Solution

I have no idea where to begin.

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Nov 30, 2009

WiFO215

Well now. The point of splitting into partial fractions would be to split the given fraction into rational functions that you already know how to integrate. Why not see if the following identity will help:
x² - a² = (x - a)(x + a)

1. What is integration using partial fractions?

Integration using partial fractions is a method used to solve integrals that cannot be easily evaluated using traditional methods. It involves breaking down a complex fraction into simpler fractions, called partial fractions, and then integrating each term separately.

2. When is integration using partial fractions used?

This method is commonly used when the integrand (function being integrated) is a rational function, meaning it is a ratio of polynomials. It can also be used when the integrand contains a factor that can be factored into linear or quadratic terms.

3. How do you determine the partial fractions?

To determine the partial fractions, the numerator of the rational function is first factored. Then, the denominator is factored and each factor is written as a separate fraction with a variable in the denominator. The coefficients of these fractions are then solved using algebraic methods.

4. Are there any rules for determining the coefficients of the partial fractions?

Yes, there are rules for determining the coefficients. For linear factors, the coefficient of the fraction is equal to the constant term in the numerator. For repeated linear factors, the coefficients are determined using a system of equations. For quadratic factors, the coefficients are determined using a similar system of equations.

5. What are the steps for integrating using partial fractions?

The steps for integrating using partial fractions are: 1) Factor the numerator and denominator of the rational function, 2) Write the factors of the denominator as separate fractions, 3) Determine the coefficients of the fractions using algebraic methods, 4) Integrate each term separately, and 5) Combine the integrated terms and simplify, if necessary.