\[ \begin{array}{r}3 x+7 y+z=10 \\ -3 x-4 y-z=6 \\ -5 x-6 y-2 z=8\end{array} \] Write the four relevant determinants in any order:
Real Tutor Solution
Answer
Solution
Sign in to Unlock Answers for Free!
A Learning Platform Trusted by Millions of Real Students and Teachers.
Reviewed and approved by the UpStudy tutoring team
Mind Expander
To find the relevant determinants for the given system of equations, we first need to form the coefficient matrix and the associated determinants. The equations are: 1. \(3x + 7y + z = 10\) 2. \(-3x - 4y - z = 6\) 3. \(-5x - 6y - 2z = 8\) The coefficient matrix \(A\) is: \[ A = \begin{bmatrix} 3 & 7 & 1 \\ -3 & -4 & -1 \\ -5 & -6 & -2 \end{bmatrix} \] The determinants we will find are: 1. The determinant of the coefficient matrix \(A\), denoted as \(|A|\). 2. The determinant of matrix \(A_x\) which is formed by replacing the first column of \(A\) with the constants from the right side of the equations. 3. The determinant of matrix \(A_y\) which is formed by replacing the second column of \(A\) with the constants from the right side. 4. The determinant of matrix \(A_z\) which is formed by replacing the third column of \(A\) with the constants from the right side. The constants from the right side are \([10, 6, 8]^T\). Thus, the matrices are: \[ A_x = \begin{bmatrix} 10 & 7 & 1 \\ 6 & -4 & -1 \\ 8 & -6 & -2 \end{bmatrix}, \quad A_y = \begin{bmatrix} 3 & 10 & 1 \\ -3 & 6 & -1 \\ -5 & 8 & -2 \end{bmatrix}, \quad A_z = \begin{bmatrix} 3 & 7 & 10 \\ -3 & -4 & 6 \\ -5 & -6 & 8 \end{bmatrix} \] So the four relevant determinants you may calculate are \(|A|\), \(|A_x|\), \(|A_y|\), and \(|A_z|\).