Sequence: An ordered list of numbers
Finite: Domain: 1, 2, 3…n ends Ex. 2, 4, 6, 8
Infinite: Domain: All positive integers Ex. 1, 3, 5…

Series: The sum of the terms in a sequence

Term: A value in the range

Summation Notation:

Special Sums:

Arithmetic sequences:
A Sequence that evolves by being added by a constant, called the Common Difference (d)

Geometric sequences:
A sequence where the ratio of every term I the same, this ratio is called the common ratio and it is denoted by “r”