Concept explainers
Find the value of x
Answer to Problem 33HP
x = − 1 makes these terms an arithmetic sequence.
Explanation of Solution
Given: The sequence:
Concept Used:
First find the common difference. The difference between the second and first term should be equal to the difference between the third and second term.
Equation:
Calculation:
Equation:
The sequence is
Now check to see if the terms have a common difference.
The terms have a common difference of − 5, so x = − 1 makes these terms an arithmetic sequence.
Thus, x = − 1 makes these terms an arithmetic sequence.
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