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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...
Question
Determine if each integral is convergent or divergent, any one works.
### Evaluation of Definite Integrals:

Below are several integrals, each requiring evaluation. These integrals involve different functions and limits of integration, providing varied examples to understand different techniques and results.

1. **Evaluate:**

   \[
   \int_{-\infty}^{0} \frac{1}{3 - 4x} \, dx
   \]

   This improper integral extends from negative infinity to 0. It requires handling the limits carefully, particularly given the asymptotic behavior as \( x \) approaches negative infinity.

2. **Evaluate:**

   \[
   \int_{1}^{\infty} \frac{1}{x^2} \, dx
   \]

   Another improper integral, this one extends from 1 to positive infinity. It involves the function \( \frac{1}{x^2} \), commonly seen in calculus, and tests the understanding of divergent and convergent behavior.

3. **Evaluate:**

   \[
   \int_{0}^{1} \frac{1}{x} \, dx
   \]

   This integral is noteworthy because the integrand \( \frac{1}{x} \) behaves uniquely at the lower limit of 0. Special attention is needed to understand the behavior near this point.

4. **Evaluate:**

   \[
   \int_{0}^{1} x \ln x \, dx
   \]

   This definite integral involves the logarithmic function multiplied by \( x \). Techniques such as integration by parts might be required to evaluate this integral.

Each integral presents distinct characteristics and requires thorough understanding and appropriate techniques to solve.
Transcribed Image Text:### Evaluation of Definite Integrals: Below are several integrals, each requiring evaluation. These integrals involve different functions and limits of integration, providing varied examples to understand different techniques and results. 1. **Evaluate:** \[ \int_{-\infty}^{0} \frac{1}{3 - 4x} \, dx \] This improper integral extends from negative infinity to 0. It requires handling the limits carefully, particularly given the asymptotic behavior as \( x \) approaches negative infinity. 2. **Evaluate:** \[ \int_{1}^{\infty} \frac{1}{x^2} \, dx \] Another improper integral, this one extends from 1 to positive infinity. It involves the function \( \frac{1}{x^2} \), commonly seen in calculus, and tests the understanding of divergent and convergent behavior. 3. **Evaluate:** \[ \int_{0}^{1} \frac{1}{x} \, dx \] This integral is noteworthy because the integrand \( \frac{1}{x} \) behaves uniquely at the lower limit of 0. Special attention is needed to understand the behavior near this point. 4. **Evaluate:** \[ \int_{0}^{1} x \ln x \, dx \] This definite integral involves the logarithmic function multiplied by \( x \). Techniques such as integration by parts might be required to evaluate this integral. Each integral presents distinct characteristics and requires thorough understanding and appropriate techniques to solve.
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