Given the arithmetic sequence an = 5 + 2(n − 1), what is the domain for n?

all integers
all integers where n ≥ 0
all integers where n > 1
all integers where n ≥ 1

In the arithmetic sequence, the consecutive terms will need to have the same sequence. n is usually the variable used to denote the number of terms of the arithmetic sequence. 

If n = 0 then, substituting this value of n to the equation will give the first or baeline point. Hence, teh answer to this item is the second choice. 

Wow. that is a really cool question.