Question

Given the arithmetic sequence an = 6 − 4(n + 2), what is the domain for n?

Answer 1

`a_n=6-4(n+2)=6-4n-8=-4n-2\\\\The\ domain:\ n\in\mathbb{N^+}\to n\in\{1;\ 2;\ 3;\ 4;\ ...\}`

Answer 2

The answer is all real numbers

Explanation:

When you plug in anything it works