STANDARD F.IF.A.3
AI

Recognize that a sequence is a function whose domain is a subset of the integers.
• Sequences (arithmetic and geometric) will be written explicitly and only in subscript notation.
• Work with geometric sequences may involve an exponential equation/formula of the form an=arn-1, where a is the first term and r is the common ratio.

AII

Recognize that a sequence is a function whose domain is a subset of the integers.  Sequences will be defined/written recursively and explicitly in subscript notation.  This standard is a fluency expectation.  Fluency in translating between recursive definitions and closed forms is helpful when dealing with many problems involving sequences and series, with applications ranging from fitting functions to tables to problems in finance.