A sequence is an ordered list of numbers. Each number contained in a sequence is called a term.
A sequence is defined by an equation or rule. The rule can be applied to each term of a sequence to generate the next term in the sequence. The ellipsis (…) at the end of a sequence means the sequence continues using the same rule.
The key to solving sequence problems is to determine the relationship between the terms.
What is the next term in the sequence?
(a) 2, 4, 6, 8, …
(b) 1, 2, 3, 5, …