8.
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All integers where n ≥ 1.
We have given that the sequence,
We have to find the domain for n.
<h3>What is the meaning of arithmetic sequence?</h3>Arithmetic sequence is a sequence of numbers such that the difference between the consecutive terms is constant. Difference here means the second minus the first.
That is,
where a = first term of sequence.
d =common difference.
n =number of terms which belongs to natural numbers
By the definition of arithmetic sequence n starts with 1
Remember that,the natural number starts with 1
Now, in given sequence for nth term
The domain for n is All integers where n ≥ 1.
To learn more about the arithmetic sequence visit:
The explicit formula for calculating the sum is
The sum of the nth term of a sequence is expressed as;
a is the first term
d is the common difference
n is the number of terms
For the sequence 0 + 1 + 2 + 3 +...
Similarly for the sequence:
1 + 2+ 3 + 4+...
Taking the product of the sum to get the explicit formula for calculating the sum
Learn more here: brainly.com/question/24547297