3. The region bounded by y = x³, y = x, x > 0 is rotated about the x – - axis.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
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Chapter8: Linear Functions
Section: Chapter Questions
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**Problem 3:**

The region bounded by the curves \( y = x^3 \), \( y = x \), and the line \( x \geq 0 \) is rotated about the x-axis.

---

This problem involves a classic calculus technique of finding the volume of a solid of revolution. To solve it, you'll typically use the disk or washer method, examining the area of the region bounded by the given curves and the specified axis. 

### Key Steps to Solve:
1. **Identify the Intersection Points:**
   - Set \( y = x^3 \) equal to \( y = x \) and solve for \( x \).
   - This gives you the points of intersection which are crucial for determining the limits of integration.

2. **Determine the Volume:**
   - Use the disk method if the bounded region is being revolved around the x-axis:
     \[
     V = \pi \int [R(x)^2 - r(x)^2] \, dx
     \]
     Where \( R(x) \) is the outer radius and \( r(x) \) is the inner radius, determined by \( y = x \) and \( y = x^3 \).

3. **Calculate the Integral:**
   - Calculate the definite integral within the limits found from the points of intersection.

This problem explores the application of integration techniques to real-world geometric problems, enhancing understanding in calculus and solid geometry contexts.
Transcribed Image Text:**Problem 3:** The region bounded by the curves \( y = x^3 \), \( y = x \), and the line \( x \geq 0 \) is rotated about the x-axis. --- This problem involves a classic calculus technique of finding the volume of a solid of revolution. To solve it, you'll typically use the disk or washer method, examining the area of the region bounded by the given curves and the specified axis. ### Key Steps to Solve: 1. **Identify the Intersection Points:** - Set \( y = x^3 \) equal to \( y = x \) and solve for \( x \). - This gives you the points of intersection which are crucial for determining the limits of integration. 2. **Determine the Volume:** - Use the disk method if the bounded region is being revolved around the x-axis: \[ V = \pi \int [R(x)^2 - r(x)^2] \, dx \] Where \( R(x) \) is the outer radius and \( r(x) \) is the inner radius, determined by \( y = x \) and \( y = x^3 \). 3. **Calculate the Integral:** - Calculate the definite integral within the limits found from the points of intersection. This problem explores the application of integration techniques to real-world geometric problems, enhancing understanding in calculus and solid geometry contexts.
The image contains two graphs side by side:

1. **Left Graph**:
   - The axes are labeled \( x \) and \( y \).
   - Two curves are plotted: 
     - The line \( y = x \), which is a straight line passing through the origin with a slope of 1.
     - The curve \( y = x^3 \), which passes through the origin and is concave upwards.
   - The region between the two curves is shaded. This shaded area is bounded by the curves \( y = x \) and \( y = x^3 \), and is between the points \( (0, 0) \) and \( (1, 1) \).

2. **Right Graph**:
   - The axes are labeled \( z \) and \( x \).
   - The diagram shows a three-dimensional solid that resembles a horn or trumpet shape.
   - This solid is a result of rotating the shaded area between \( y = x \) and \( y = x^3 \) in the left graph around the \( x \)-axis.

In the top left corner, there is a numerical expression written in red: \( .4\pi/21 \).
Transcribed Image Text:The image contains two graphs side by side: 1. **Left Graph**: - The axes are labeled \( x \) and \( y \). - Two curves are plotted: - The line \( y = x \), which is a straight line passing through the origin with a slope of 1. - The curve \( y = x^3 \), which passes through the origin and is concave upwards. - The region between the two curves is shaded. This shaded area is bounded by the curves \( y = x \) and \( y = x^3 \), and is between the points \( (0, 0) \) and \( (1, 1) \). 2. **Right Graph**: - The axes are labeled \( z \) and \( x \). - The diagram shows a three-dimensional solid that resembles a horn or trumpet shape. - This solid is a result of rotating the shaded area between \( y = x \) and \( y = x^3 \) in the left graph around the \( x \)-axis. In the top left corner, there is a numerical expression written in red: \( .4\pi/21 \).
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