Concept explainers
a.
Use a graphing utility to graph the function.
a.
Answer to Problem 50E
Explanation of Solution
Calculation:
Consider the polynomial function
Plot the graph of the polynomial function step by step,
First ON the calculator and press
The display is as shown below
Set the range by pressing WINDOW and make sure that the negative sign at the starting of the expression comes from minus sign in the brackets which is to the left of the ENTER button.
The display is as shown below
Press GRAPH to plot the graph of the above polynomial equation
The display is as shown below
b.
Use the graph to approximate any
b.
Answer to Problem 50E
Explanation of Solution
Calculation:
Consider the polynomial function
Press TRACE to find out the
The display is as shown below
.Press yellow colored key and then CALC to analyze the current graph functions.
Select “zero” in the second line and then press ENTER.
The current graph is displayed with “Left Bound?” in the bottom-left corner Press Arrow keys to select the
The display is as shown below
The current graph is displayed with “Right Bound?” in the bottom-left corner Press Arrow keys to select the
The current graph is displayed with “Guess?” in the bottom-left corner Press Arrow keys (or enter a value) to select a point near the zero of the function, between the bounds, and then press ENTER.
The display is as shown below
The
Hence, we have an
The display will be
Repeat the steps from step
Hence, we have another
The display is as shown below
Repeat the steps from step
Hence, we have another
The display is as shown below
c.
Find any real zeros of the function algebraically.
c.
Answer to Problem 50E
Explanation of Solution
Calculation:
Consider the polynomial function
Solving the equation
Hence,
d.
Compare the results of part
d.
Answer to Problem 50E
The results obtained analytically match with the results of graphing utility tool as shown above.
Explanation of Solution
Calculation:
Consider the polynomial function
Hence, the results obtained analytically match with the results of graphing utility tool as shown above.
Chapter 2 Solutions
EBK PRECALCULUS W/LIMITS
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