SI. f dV here D is the solid region in the first octant between the elliptic cylinder 4x2 + 22 = 16 an ane y = 3. (0,0, 4) 4.x2 + z2 = 16 (0,3, 4) (2,0,0)

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

Set up an iterated integral and evaluate it

### Problem Statement

Let \( f(x, y, z) = xy \). Evaluate

\[
\iiint_D f \, dV
\]

where \(D\) is the solid region in the first octant between the elliptic cylinder \( 4x^2 + z^2 = 16 \) and the plane \( y = 3 \).

### Diagram Explanation

The provided diagram visually represents the solid region \( D \) in the first octant.

#### Key Features:
- **Elliptic Cylinder:** Represented by the equation \( 4x^2 + z^2 = 16 \). This surface is depicted as the curved, blue-shaded region in the three-dimensional plot.
- **Plane \( y = 3 \):** This plane is depicted as the gray-shaded region. It intersects the elliptic cylinder and confines the region of integration.

#### Axes:
- **x-axis:** Extends from \( (2,0,0) \) horizontally.
- **y-axis:** Extends from \( (2,3,0) \) vertically.
- **z-axis:** Extends from \( (0,0,4) \) upwards.

#### Intersections:
- **Intersection of Cylinder and Plane (at boundaries):**
  - At \( y=0 \):
    - Points: \( (2, 0, 0) \) and \( (0, 0, 4) \)
  - At \( y=3 \):
    - Points: \( (2, 3, 0) \) and \( (0, 3, 4) \)
  - The intersection points of the elliptic cylinder with the plane \( y = 3 \) form a rectangular boundary for the region in consideration.

The diagram is useful for visualizing the limits and boundaries of the region \( D \) we are integrating over. It highlights the interaction of a three-dimensional solid constrained by both a curved surface (the elliptic cylinder) and a flat surface (the plane \(y=3\)).
Transcribed Image Text:### Problem Statement Let \( f(x, y, z) = xy \). Evaluate \[ \iiint_D f \, dV \] where \(D\) is the solid region in the first octant between the elliptic cylinder \( 4x^2 + z^2 = 16 \) and the plane \( y = 3 \). ### Diagram Explanation The provided diagram visually represents the solid region \( D \) in the first octant. #### Key Features: - **Elliptic Cylinder:** Represented by the equation \( 4x^2 + z^2 = 16 \). This surface is depicted as the curved, blue-shaded region in the three-dimensional plot. - **Plane \( y = 3 \):** This plane is depicted as the gray-shaded region. It intersects the elliptic cylinder and confines the region of integration. #### Axes: - **x-axis:** Extends from \( (2,0,0) \) horizontally. - **y-axis:** Extends from \( (2,3,0) \) vertically. - **z-axis:** Extends from \( (0,0,4) \) upwards. #### Intersections: - **Intersection of Cylinder and Plane (at boundaries):** - At \( y=0 \): - Points: \( (2, 0, 0) \) and \( (0, 0, 4) \) - At \( y=3 \): - Points: \( (2, 3, 0) \) and \( (0, 3, 4) \) - The intersection points of the elliptic cylinder with the plane \( y = 3 \) form a rectangular boundary for the region in consideration. The diagram is useful for visualizing the limits and boundaries of the region \( D \) we are integrating over. It highlights the interaction of a three-dimensional solid constrained by both a curved surface (the elliptic cylinder) and a flat surface (the plane \(y=3\)).
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