Concept explainers
To find: The solution set of the given inequality.
Answer to Problem 63RE
Solution set:
Explanation of Solution
Given information:
An inequality is given as -
Concept used:
Key numbers of a polynomial are its zeros. Real zeros of a polynomial divides real line into intervals in which the polynomial does not change its sign. A test value is taken from each interval and corresponding value of inequality is calculated (whether positive or negative). The inequality maintains same sign for whole interval.
Calculation:
Given inequality is -
Key numbers are
Test interval | Test | Polynomial value
| Conclusion |
Positive | |||
Negative | |||
Positive |
From above table, it can be concluded that inequality is satisfied in the interval
Hence, solution set for the given inequality will be
Chapter 2 Solutions
Precalculus with Limits
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