Unit
Sequences and Series
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
To unlock all 5,300 videos, start your free trial.
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
In order to find a finite sum of a geometric sequence, (that is, a list of numbers where there is a common "multiply by number," or r), you will need three pieces of information: the first term, the ratio, and how many terms are being added. From there, plug those values into the formula for a geometric series and evaluate, being especially careful with the order of operations. Simplify what is inside the parentheses, then do the exponent, and then multiply by the term out front.
Transcript Coming Soon!