In Exercises 5–14, the matrix associated with the solution to a system of linear equations in x, y, and z is given. Write the solution to the system, if it exists. 6. [ 1 0 0 − 2 0 1 0 4 0 0 1 8 ]
In Exercises 5–14, the matrix associated with the solution to a system of linear equations in x, y, and z is given. Write the solution to the system, if it exists. 6. [ 1 0 0 − 2 0 1 0 4 0 0 1 8 ]
Solution Summary: The author explains that the matrix associated with the solution to a system of equations is in row-echelon form.
In Exercises 5–14, the matrix associated with the solution to a system of linear equations in x, y, and z is given. Write the solution to the system, if it exists.
In Exercises 11–14, solve the systems of equations in Z7.
Solve each system in Exercises 1–4 by using elementary rowoperations on the equations or on the augmented matrix. Followthe systematic elimination procedure described in this section.. x1 + 5x2 =7 - 2x1- 7x2 = -5
In Exercises 7–10, the augmented matrix of a linear system has
been reduced by row operations to the form shown. In each case,
continue the appropriate row operations and describe the solution
set of the original system.
1
7
3 -4
1
-4
1
-1
3
7.
8.
1
7
1
1
-2
0 -4
0 -7
1
-1
1
-3
9.
1
-3 -1
4
Chapter 7 Solutions
College Algebra in Context with Applications for the Managerial, Life, and Social Sciences (5th Edition)
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