Algebra 2 Sequences and Series

Which formula would determine the SUM of the first 8 terms of the following sequence?

Which formula would correctly determine the SUM of the first 8 terms of the following series. 80, 20, 5,...

How can we represent the series in sigma notation?

A rule that defines the nth term a_n, or a general term, of a sequence as a function of n.

• Explicit Rule

• Arithmetic Sequence

• Recursive Rule

An equation to represent the n^th term of the sequence is known as 

• explicit formula

• arithmetic sequence

• geometric sequence

• recursive formula

• 190

• 192

• 64

• 62

• Arithmetic

• Geometric

• Neither