Determine if the following vectors are orthogonal. 12 2 -8 %3D Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a simplified fraction) O A. The vectors u and v are not orthogonal because u v = O B. The vectors u and v are orthogonal because u•v = O C. The vectors u and v are not orthogonal because u + v = O D. The vectors u and v are orthogonal because u + v =
Determine if the following vectors are orthogonal. 12 2 -8 %3D Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a simplified fraction) O A. The vectors u and v are not orthogonal because u v = O B. The vectors u and v are orthogonal because u•v = O C. The vectors u and v are not orthogonal because u + v = O D. The vectors u and v are orthogonal because u + v =
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![### Determining Orthogonality of Vectors
In this lesson, we will determine if the following vectors are orthogonal.
Given vectors:
\[
\mathbf{u} = \begin{bmatrix} 12 \\ 4 \\ -8 \end{bmatrix}, \quad \mathbf{v} = \begin{bmatrix} 2 \\ -4 \\ 1 \end{bmatrix}
\]
**Question:**
Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a simplified fraction.)
**Options:**
- **A.** The vectors \(\mathbf{u}\) and \(\mathbf{v}\) are not orthogonal because \(\mathbf{u} \cdot \mathbf{v} =\) [ ]
- **B.** The vectors \(\mathbf{u}\) and \(\mathbf{v}\) are orthogonal because \(\mathbf{u} \cdot \mathbf{v} =\) [ ]
- **C.** The vectors \(\mathbf{u}\) and \(\mathbf{v}\) are not orthogonal because \(\mathbf{u} + \mathbf{v} =\) [ ]
- **D.** The vectors \(\mathbf{u}\) and \(\mathbf{v}\) are orthogonal because \(\mathbf{u} + \mathbf{v} =\) [ ]
**Explanation:**
Vectors \(\mathbf{u}\) and \(\mathbf{v}\) are orthogonal if their dot product is zero. The dot product of \(\mathbf{u}\) and \(\mathbf{v}\) is calculated as follows:
\[
\mathbf{u} \cdot \mathbf{v} = (12 \times 2) + (4 \times -4) + (-8 \times 1)
\]
Calculate each term:
\[
(12 \times 2) = 24
\]
\[
(4 \times -4) = -16
\]
\[
(-8 \times 1) = -8
\]
Therefore:
\[
\mathbf{u} \cdot \mathbf{v} = 24 + (-16) + (-8) = 0
\]
Since \(\mathbf{u} \cdot \mathbf{v} = 0\), the vectors \(\mathbf](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F780f9839-f737-4aba-91a2-6210989911b1%2F529893a1-1f81-45f7-a736-675f6e424b97%2Fco21ht4_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Determining Orthogonality of Vectors
In this lesson, we will determine if the following vectors are orthogonal.
Given vectors:
\[
\mathbf{u} = \begin{bmatrix} 12 \\ 4 \\ -8 \end{bmatrix}, \quad \mathbf{v} = \begin{bmatrix} 2 \\ -4 \\ 1 \end{bmatrix}
\]
**Question:**
Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a simplified fraction.)
**Options:**
- **A.** The vectors \(\mathbf{u}\) and \(\mathbf{v}\) are not orthogonal because \(\mathbf{u} \cdot \mathbf{v} =\) [ ]
- **B.** The vectors \(\mathbf{u}\) and \(\mathbf{v}\) are orthogonal because \(\mathbf{u} \cdot \mathbf{v} =\) [ ]
- **C.** The vectors \(\mathbf{u}\) and \(\mathbf{v}\) are not orthogonal because \(\mathbf{u} + \mathbf{v} =\) [ ]
- **D.** The vectors \(\mathbf{u}\) and \(\mathbf{v}\) are orthogonal because \(\mathbf{u} + \mathbf{v} =\) [ ]
**Explanation:**
Vectors \(\mathbf{u}\) and \(\mathbf{v}\) are orthogonal if their dot product is zero. The dot product of \(\mathbf{u}\) and \(\mathbf{v}\) is calculated as follows:
\[
\mathbf{u} \cdot \mathbf{v} = (12 \times 2) + (4 \times -4) + (-8 \times 1)
\]
Calculate each term:
\[
(12 \times 2) = 24
\]
\[
(4 \times -4) = -16
\]
\[
(-8 \times 1) = -8
\]
Therefore:
\[
\mathbf{u} \cdot \mathbf{v} = 24 + (-16) + (-8) = 0
\]
Since \(\mathbf{u} \cdot \mathbf{v} = 0\), the vectors \(\mathbf
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