
Concept explainers
(a)
Determine whether the sequence is an arithmetic sequence.
(a)

Answer to Problem 35HP
Yes, this is an arithmetic sequence Common Difference = x
Next three terms are :
Explanation of Solution
Given:
The sequence:
Concept Used:
An arithmetic sequence is a list of numbers with a definite pattern. If you take any number in the sequence then subtract it by the previous one and the result is always the same or constant then it is an arithmetic sequence.
In an Arithmetic Sequence the difference between one term and the next is a constant.
Calculation:
The sequence:
First term =
Difference between second term and first term is
Second term = 3x+ 1 and the third term is 4x +1
Difference between third term and second term is
This is an arithmetic sequence. The difference between terms is constant.
First term
Terms | Symbol | In terms of | Numbers |
Fourth term | |||
Fifth term | |||
Sixth term |
The next three terms of the sequence
Thus, yes, this is an arithmetic sequence. The next three terms are:
(b)
Determine whether the sequence is an arithmetic sequence.
(b)

Answer to Problem 35HP
No, this is not an arithmetic sequence
Explanation of Solution
Given:
The sequence:
Concept Used:
An arithmetic sequence is a list of numbers with a definite pattern. If you take any number in the sequence then subtract it by the previous one and the result is always the same or constant then it is an arithmetic sequence.
In an Arithmetic Sequence the difference between one term and the next is a constant.
Calculation:
The sequence:
First term = 2xand the second term is 4x
Difference between second term and first term is
Second term = 4x and the third term is 8x
Difference between third term and second term is
This is not an arithmetic sequence. The difference between terms is not constant.
Thus,no, this is not an arithmetic sequence.
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