Question

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

Answer 1

All real numbers

All integers where n ≥ 1

All integers where n > 1

All integers where n ≥ 2

Answer 2

n
sum k
k=1

Answer 3

= (n2 + n) / 2
= (1/2)n2 + (1/2)n

Answer 4

so all real numbers?

Answer 5

yes all r real number.