Concept explainers
To verify the upper and lower bounds using synthetic division and to determine the real zeros of the function
Upper bound:
Lower bound:
Answer to Problem 74E
Explanation of Solution
Given:
Function:
Upper bound:
Lower bound:
Calculation:
1. Verifying upper bound:
Using synthetic division,
Here, the last row values are positive values or zeros.
Hence, the upper bound of given function is x = 4.
2. Verifying lower bound:
Using synthetic division,
Here, the last row values are alternatively positive and negative.
Hence, the lower bound of given function is x = -3.
3. Calculation of real zeros:
Here, the zeros are calculated using graphical method.
Calculation for graph:
Consider
Values of x | Values of f (x) |
0 | 3 |
1 | -3 |
-1 | 19 |
2 | 13 |
-2 | 51 |
By taking different values of x, the graph can be plotted.
Graph:
Interpretation:
By observing graph, it is clear that the curve of the function meets x-axis at
Hence, the zeros of the function are
Conclusion:
Therefore, the zeros of given polynomial function are
Chapter 2 Solutions
Precalculus with Limits: A Graphing Approach
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- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning