# Formula for geometric sequence

### Explore related topics

Fibonacci Spiral - Golden Spiral Logarithmic spiral whose growth factor is φ, the golden ratio - gets wider (or further from its origin) by a factor of φ for every quarter turn it makes.

*108*

*14*

Students learn the explicit formula for geometric sequences through these doodle notes. Additionally, the sum of infinite and finite geometric sequences formulas are introduced with examples for practice. Doodle notes are a great way to activate the creative side of the brain while learning material that often just uses the logical side.

Understand that sequences are types of functions, sometimes expressed recursively, whose domain is a subset.

One of my last Algebra 2 units before state testing was arithmetic and geometric sequences and series. Our students are given the formulas ...

Sigma Notion...need this for Ice Cream math book from Life of Fred.

Arithmetic and geometric sequences reference sheet - recursive and explicit formulas with practice

Students revisit linear and exponential scenarios through equations, tables and graphs. They will use horizontal shifts to create sequences with initial values at n=1. They will practice writing functions using sequence notation. Given selected values for a sequence, students will find the initial value, common difference or common ratio then write the formula for the sequence. They will use the formulae for finite series. This mission is aligned with Common Core State Standards: HSF.LE.A.2

*14*

*6*