A. Sequences

A sequence is an ordered list of elements.  Notice the word ordered.  A sequence is not random, but has a pattern or follows a set of rules.  Each element in the sequence is called a term, which is symbolized by \(t \).  Each number in a sequence is considered a term, and each term is separated by a comma.  The terms in a sequence are numbered, starting at the first term, \(t_1\), then the second term, \(t_2\), and so on until the \(n^{th}\) term, or general term, written as \(t_n\).
Sequences can be finite or infinite.  A finite sequence has an ending point, whereas an infinite sequence does not; it continues forever.

An example of a finite sequence is \(2, 4, 8, 16, 32, …, 1024\).

An example of an infinite sequence is \(4, 7, 10, 13, 16, 19, 22, …\).