3x? +x- 5 -dx (x+2)(x² +1)

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
icon
Related questions
Question

Use PARTIAL FRACTIONS to solve the following integral.

Here is the integral expression you need to evaluate:

$$\int \frac{3x^2 + x - 5}{(x+2)(x^2+1)} \, dx$$

This integral represents a rational function where the numerator is a polynomial \(3x^2 + x - 5\) and the denominator is the product of two polynomials \((x+2)\) and \((x^2+1)\). In order to solve this integral, partial fraction decomposition can be employed.

Partial fraction decomposition involves expressing the complex rational function as a sum of simpler fractions, which can be integrated individually.

The steps generally involve:
1. Factoring the denominator, if necessary.
2. Setting up the partial fraction decomposition with unknown coefficients.
3. Solving for the unknown coefficients by equating the expressions.
4. Integrating each of the simpler fractions separately.

Begin by setting up the partial fractions for the given function:

$$\frac{3x^2 + x - 5}{(x+2)(x^2+1)} = \frac{A}{x+2} + \frac{Bx + C}{x^2 + 1}$$

Then, find the constants \(A\), \(B\), and \(C\) and proceed with the integration. This process will help in breaking down the given integral into simpler integrals that are easier to handle.
Transcribed Image Text:Here is the integral expression you need to evaluate: $$\int \frac{3x^2 + x - 5}{(x+2)(x^2+1)} \, dx$$ This integral represents a rational function where the numerator is a polynomial \(3x^2 + x - 5\) and the denominator is the product of two polynomials \((x+2)\) and \((x^2+1)\). In order to solve this integral, partial fraction decomposition can be employed. Partial fraction decomposition involves expressing the complex rational function as a sum of simpler fractions, which can be integrated individually. The steps generally involve: 1. Factoring the denominator, if necessary. 2. Setting up the partial fraction decomposition with unknown coefficients. 3. Solving for the unknown coefficients by equating the expressions. 4. Integrating each of the simpler fractions separately. Begin by setting up the partial fractions for the given function: $$\frac{3x^2 + x - 5}{(x+2)(x^2+1)} = \frac{A}{x+2} + \frac{Bx + C}{x^2 + 1}$$ Then, find the constants \(A\), \(B\), and \(C\) and proceed with the integration. This process will help in breaking down the given integral into simpler integrals that are easier to handle.
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Indefinite Integral
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, calculus and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Calculus: Early Transcendentals
Calculus: Early Transcendentals
Calculus
ISBN:
9781285741550
Author:
James Stewart
Publisher:
Cengage Learning
Thomas' Calculus (14th Edition)
Thomas' Calculus (14th Edition)
Calculus
ISBN:
9780134438986
Author:
Joel R. Hass, Christopher E. Heil, Maurice D. Weir
Publisher:
PEARSON
Calculus: Early Transcendentals (3rd Edition)
Calculus: Early Transcendentals (3rd Edition)
Calculus
ISBN:
9780134763644
Author:
William L. Briggs, Lyle Cochran, Bernard Gillett, Eric Schulz
Publisher:
PEARSON
Calculus: Early Transcendentals
Calculus: Early Transcendentals
Calculus
ISBN:
9781319050740
Author:
Jon Rogawski, Colin Adams, Robert Franzosa
Publisher:
W. H. Freeman
Precalculus
Precalculus
Calculus
ISBN:
9780135189405
Author:
Michael Sullivan
Publisher:
PEARSON
Calculus: Early Transcendental Functions
Calculus: Early Transcendental Functions
Calculus
ISBN:
9781337552516
Author:
Ron Larson, Bruce H. Edwards
Publisher:
Cengage Learning