Concept explainers
(a)
To sketch: the graph of the functions, to find where the function is increasing and decreasing and approximate any
(a)

Answer to Problem 74E
The function is decreasing implies decreasing interval is
Explanation of Solution
Given information:
Given function
Calculation:
Consider the function
Use the T1-83 calculator.
Enter the expression in the T1-83 calculator after pressing
Press the window button and adjust the window as shown below:
Click on the graph button and below is the graph of the expression
Use the TRACE button and then the arrow keys to move around the function curve. Observe the graph and find that the function is increasing between 0 and 2. Hence increasing interval is
Now with the help of TRACE option the peak and valley of the curve is found to be at 2 and 0 respectively. Hence the relative maximum occurs at
(b)
To sketch: the graph of the functions, to find where the function is increasing and decreasing and approximate any relative maximum or minimum values.
(b)

Answer to Problem 74E
Decreasing interval is
Explanation of Solution
Given information:
Given function
Calculation:
Consider the function
Use the T1-83 calculator.
Enter the expression in the T1-83 calculator after pressing
Press the WINDOW button and adjust the window as shown below:
Click on the graph button and below is the graph of the expression
Use the TRACE button and then the arrow keys to move around the function curve. Observe the graph and find the function is decreasing between 1.44 and infinite. Hence decreasing interval is
Hence the relative maximum occurs at
Chapter 3 Solutions
EBK PRECALCULUS W/LIMITS
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