a.
Solve the augmented matrix.
a.
Answer to Problem 39E
Explanation of Solution
Given information:
Add
Add
Multiply
Multiply
Calculation:
Consider the augmented matrix
Perform the below row operations
Add
Hence, the resultant matrix is
Add
Hence, the resultant is
Multiply
Hence, the resultant is
Multiply
Hence, the resultant is
b.
Write and solve the system of linear equations
b.
Answer to Problem 39E
Explanation of Solution
Given information:
Calculation:
The system of equations from the augmented matrix is
Solve these equations
Multiply the 1st equation by 2 and then add it to the 2nd equation
Substitute
Hence, the solution is
This is same as in (a).
c.
Compare the two solution methods.
c.
Answer to Problem 39E
Using row operations is easy method
Explanation of Solution
Given information:
Calculation:
Hence, using row operations is easy method.
Chapter 8 Solutions
EBK PRECALCULUS W/LIMITS
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