2. The eigenvalues 31 Let A =-2 6 4 2 and corresponding eigenspaces are: -1 2 = 7: 1 and 1 = -2: 1/2 (a) Orthogonally diagonalize the matrix A. (b) Construct a spectral decomposition of the matrix A.

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Chapter2: Second-order Linear Odes
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The image contains mathematical content involving linear algebra concepts such as matrices, eigenvalues, eigenvectors, orthogonal diagonalization, and spectral decomposition. Below is the transcription tailored for an educational website:

---

### Linear Algebra: Matrices, Eigenvalues, and Eigenvectors

Given the matrix \( A \):

\[ A = \begin{bmatrix}
3 & -2 & 4 \\
-2 & 6 & 2 \\
4 & 2 & 3
\end{bmatrix} \]

The eigenvalues and corresponding eigenspaces are calculated as follows:

For the eigenvalue \( \lambda = 7 \):

\[ \lambda = 7: \; \begin{Bmatrix}
\begin{pmatrix}
1 \\
0 \\
1
\end{pmatrix}, 
\begin{pmatrix}
-1/2 \\
1 \\
0
\end{pmatrix}
\end{Bmatrix} \]

For the eigenvalue \( \lambda = -2 \):

\[ \lambda = -2: \; \begin{Bmatrix}
\begin{pmatrix}
-1 \\
-1/2 \\
1
\end{pmatrix}
\end{Bmatrix} \]

### Exercises

**(a)** Orthogonally diagonalize the matrix \( A \).

**(b)** Construct a spectral decomposition of the matrix \( A \).

This matrix analysis involves understanding how to calculate eigenvalues and eigenvectors, and then using these to transform the matrix into a diagonal form, as well as decomposing it spectrally.

---

In the explanation, we have highlighted both eigenvalues and their corresponding eigenspaces, which help in further operations such as orthogonal diagonalization and spectral decomposition. This setup provides a clear understanding of the matrix \( A \) and its properties for further analysis in linear algebra studies.
Transcribed Image Text:The image contains mathematical content involving linear algebra concepts such as matrices, eigenvalues, eigenvectors, orthogonal diagonalization, and spectral decomposition. Below is the transcription tailored for an educational website: --- ### Linear Algebra: Matrices, Eigenvalues, and Eigenvectors Given the matrix \( A \): \[ A = \begin{bmatrix} 3 & -2 & 4 \\ -2 & 6 & 2 \\ 4 & 2 & 3 \end{bmatrix} \] The eigenvalues and corresponding eigenspaces are calculated as follows: For the eigenvalue \( \lambda = 7 \): \[ \lambda = 7: \; \begin{Bmatrix} \begin{pmatrix} 1 \\ 0 \\ 1 \end{pmatrix}, \begin{pmatrix} -1/2 \\ 1 \\ 0 \end{pmatrix} \end{Bmatrix} \] For the eigenvalue \( \lambda = -2 \): \[ \lambda = -2: \; \begin{Bmatrix} \begin{pmatrix} -1 \\ -1/2 \\ 1 \end{pmatrix} \end{Bmatrix} \] ### Exercises **(a)** Orthogonally diagonalize the matrix \( A \). **(b)** Construct a spectral decomposition of the matrix \( A \). This matrix analysis involves understanding how to calculate eigenvalues and eigenvectors, and then using these to transform the matrix into a diagonal form, as well as decomposing it spectrally. --- In the explanation, we have highlighted both eigenvalues and their corresponding eigenspaces, which help in further operations such as orthogonal diagonalization and spectral decomposition. This setup provides a clear understanding of the matrix \( A \) and its properties for further analysis in linear algebra studies.
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