Question

please help last one of my day

Given the arithmetic sequence an = −4 + 4(n − 1), what is the domain for n?

Answer 1

hmmm what's a "domain" of an expression anyway?

Answer 2

\(\bf a_{\color{brown}{ n}}=-4+4({\color{brown}{ n}}-1)\qquad {\color{brown}{ n}} \in \square ?\)