Use the method of partial fractions to find the area bounded by the curve y

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...
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**Educational Content: Calculating Area Using Partial Fractions**

**Problem Statement:**

Use the method of partial fractions to find the area bounded by the curve given by the equation:

\[ y = \frac{2x - 8}{x^2 - 5x + 6} \]

The area is bounded by the x-axis, \( x = 9 \), and \( x = 13 \). Show all work.

**Solution Explanation:**

To solve this problem, we follow these steps:

1. **Identify the Fraction to Decompose:**
   The function is in the form of a rational function \( \frac{2x - 8}{x^2 - 5x + 6} \).

2. **Factor the Denominator:**
   The quadratic denominator \( x^2 - 5x + 6 \) can be factored into \((x - 2)(x - 3)\).

3. **Setup Partial Fractions:**
   The expression can be decomposed as:
   \[
   \frac{2x - 8}{(x - 2)(x - 3)} = \frac{A}{x - 2} + \frac{B}{x - 3}
   \]
   Here, \( A \) and \( B \) are constants we need to determine.

4. **Solve for Constants \( A \) and \( B \):**
   Multiply through by the common denominator to clear fractions:
   \[
   2x - 8 = A(x - 3) + B(x - 2)
   \]

   Expand and equate coefficients to solve for \( A \) and \( B \).

5. **Integrate to Find the Area:**
   Once the partial fractions are found, integrate each fraction separately between the limits \( x = 9 \) and \( x = 13 \) to find the bounded area.

6. **Apply Calculus to Find Definite Integrals:**
   Use techniques of integration to evaluate the area under the curve within the specified limits.

**Conclusion:**

By using partial fractions, we break down complex rational expressions into simpler forms, making it easier to integrate. This method is particularly useful in finding areas under curves, providing a systematic approach to solving complex calculus problems.
Transcribed Image Text:**Educational Content: Calculating Area Using Partial Fractions** **Problem Statement:** Use the method of partial fractions to find the area bounded by the curve given by the equation: \[ y = \frac{2x - 8}{x^2 - 5x + 6} \] The area is bounded by the x-axis, \( x = 9 \), and \( x = 13 \). Show all work. **Solution Explanation:** To solve this problem, we follow these steps: 1. **Identify the Fraction to Decompose:** The function is in the form of a rational function \( \frac{2x - 8}{x^2 - 5x + 6} \). 2. **Factor the Denominator:** The quadratic denominator \( x^2 - 5x + 6 \) can be factored into \((x - 2)(x - 3)\). 3. **Setup Partial Fractions:** The expression can be decomposed as: \[ \frac{2x - 8}{(x - 2)(x - 3)} = \frac{A}{x - 2} + \frac{B}{x - 3} \] Here, \( A \) and \( B \) are constants we need to determine. 4. **Solve for Constants \( A \) and \( B \):** Multiply through by the common denominator to clear fractions: \[ 2x - 8 = A(x - 3) + B(x - 2) \] Expand and equate coefficients to solve for \( A \) and \( B \). 5. **Integrate to Find the Area:** Once the partial fractions are found, integrate each fraction separately between the limits \( x = 9 \) and \( x = 13 \) to find the bounded area. 6. **Apply Calculus to Find Definite Integrals:** Use techniques of integration to evaluate the area under the curve within the specified limits. **Conclusion:** By using partial fractions, we break down complex rational expressions into simpler forms, making it easier to integrate. This method is particularly useful in finding areas under curves, providing a systematic approach to solving complex calculus problems.
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