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a.
To solve the augmented matrix.
a.
![Check Mark](/static/check-mark.png)
Answer to Problem 31E
The solution of the system of linear equation is
Explanation of Solution
Given information:
The augmented matrix is given as:
Calculation:
Perform row operation to solve the augmented matrix,
The matrix is in row-echelon form, and the corresponding system is,
Solve both the equation,
And,
Hence,
The solution of the system of linear equation is
b.
To solve the system of linear equation represented by the augmented matrix.
b.
![Check Mark](/static/check-mark.png)
Answer to Problem 31E
The solution of the system of linear equation is
Explanation of Solution
Given information:
The augmented matrix is given as:
Calculation:
Convert the augmented matrix into system of linear equation,
Use back-substitution to solve the system of linear equation,
Substitute,
Now, substitute,
Hence,
The solution of the system of linear equation is
c.
To compare the two-solution method.
c.
![Check Mark](/static/check-mark.png)
Answer to Problem 31E
Method 1 is more preferable because it requires lesser time to solve the system of linear equation.
Explanation of Solution
Given information:
The augmented matrix is given as:
On comparing both the method of solving the system of linear equation, it can be concluded that both methods produce same solution that is the solution of the system of linear equation is
But method 1 is more preferable because it requires lesser time to solve the system of linear equation.
Chapter 7 Solutions
Precalculus with Limits: A Graphing Approach
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