Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

Thank you for watching the video.

To unlock all 5,300 videos, start your free trial.

Geometric Sequences - Problem 8

Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

Share

A geometric mean is an omitted number in the geometric number pattern. Finding these means, especially if there are more than one omitted in a row, requires knowing what the common ratio, r, value is between terms. From your first known term, count how many r's are being multiplied to get to the next known term. Then set up an equation to solve for r: be careful!! If r is being raised to an even power, then you'll have two r's to deal with and multiple possible sequences going on!

Transcript Coming Soon!