a.
To explain: how each equation uses the property. A property of determinants is given ( A and B are square matrices). Then use a graphing utility to verify that each equation is true.
a.

Answer to Problem 81E
The statement is verified.
Explanation of Solution
Given information: If Bis obtained from A by multiplying a row of A by a nonzero
constantc or by multiplying a column of A by a nonzero constant c, then
Calculation:
Row 2 multiplied by constant 3.
By graphing utility.
Hence, the statement is verified.
b.
To explain: how each equation uses the property. A property of determinants is given ( A andB are square matrices). Then use a graphing utility to verify that each equation is true.
b.

Answer to Problem 81E
The statement is verified by graphical utility.
Explanation of Solution
Given information: If B is obtained from A by multiplying a row of A by a nonzero
constantc or by multiplying a column of A by a nonzero constant c, then
Calculation:
Column 1 is multiplied by 2 and column 2 is multiplied by 4.
By graphing utility.
So,
Hence, the statement is verified.
Chapter 7 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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