The general term is [tex]a_n[/tex] (a sub n; n is a subscript)
The first term is a1
The second term is a2
The third term is a3
and so on...
The first term starts at n = 1. We replace the n in [tex]a_n[/tex] with 1 to get [tex]a_1[/tex]. A similar thing happens with n = 2 and onward
The domain is therefore the set {1, 2, 3, 4, 5, ...} which is the set of...
* Counting numbers
* Positive Whole numbers
* Natural numbers
Those are three ways to express the same set
We can also say [tex]n \ge 1[/tex] where n is an integer or whole number
A similar inequality would be [tex]n \ \textgreater \ 0[/tex] which is effectively the same as idea as the last inequality (n is also an integer or whole number).
