In problems 8-10, solve the given system of equations by Gaussian elimination (row echelon form) and Gauss-Jordan elimination (reduced row echelon form). 8. x+y 2z = 14 2xy + z = 0 6x + 3y + 4z = 1

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need help on 8 and 9 

In this section, we cover several mathematical problems related to matrices and systems of equations.

**Problem 7: Matrix Identification**

- Given matrix:
  \[
  A = \begin{bmatrix} 2 & 1 & 0 \\ -1 & 2 & 1 \\ 1 & 2 & 1 \end{bmatrix}
  \]

**Problems 8 – 10: Solutions of Systems of Equations**

Solve the following systems of equations using Gaussian elimination (row echelon form) and Gauss-Jordan elimination (reduced row echelon form).

8. System of equations:
   \[
   \begin{cases} 
   x + y - 2z = 14 \\ 
   2x - y + z = 0 \\ 
   6x + 3y + 4z = 1 
   \end{cases}
   \]

9. System of equations:
   \[
   \begin{cases} 
   y + z = -5 \\ 
   5x + 4y - 16z = -10 \\ 
   x - y - 5z = 7 
   \end{cases}
   \]

10. System of equations:
    \[
    \begin{cases} 
    2x + y + z = 4 \\ 
    10x - 2y + 2z = -1 \\ 
    6x - 2y + 4z = 8 
    \end{cases}
    \]

**Problems 11 – 15: Eigenvalues and Eigenvectors**

In these problems, find the eigenvalues and eigenvectors of the given matrices.

11. Matrix:
    \[
    A = \begin{bmatrix} -1 & 2 \\ -7 & 8 \end{bmatrix}
    \]

Use these problems to practice solving linear equations, working with matrices, and understanding the properties of eigenvalues and eigenvectors.
Transcribed Image Text:In this section, we cover several mathematical problems related to matrices and systems of equations. **Problem 7: Matrix Identification** - Given matrix: \[ A = \begin{bmatrix} 2 & 1 & 0 \\ -1 & 2 & 1 \\ 1 & 2 & 1 \end{bmatrix} \] **Problems 8 – 10: Solutions of Systems of Equations** Solve the following systems of equations using Gaussian elimination (row echelon form) and Gauss-Jordan elimination (reduced row echelon form). 8. System of equations: \[ \begin{cases} x + y - 2z = 14 \\ 2x - y + z = 0 \\ 6x + 3y + 4z = 1 \end{cases} \] 9. System of equations: \[ \begin{cases} y + z = -5 \\ 5x + 4y - 16z = -10 \\ x - y - 5z = 7 \end{cases} \] 10. System of equations: \[ \begin{cases} 2x + y + z = 4 \\ 10x - 2y + 2z = -1 \\ 6x - 2y + 4z = 8 \end{cases} \] **Problems 11 – 15: Eigenvalues and Eigenvectors** In these problems, find the eigenvalues and eigenvectors of the given matrices. 11. Matrix: \[ A = \begin{bmatrix} -1 & 2 \\ -7 & 8 \end{bmatrix} \] Use these problems to practice solving linear equations, working with matrices, and understanding the properties of eigenvalues and eigenvectors.
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