13.3 – Arithmetic and Geometric Series and Their Sums Objectives: You should be able to…
NOTE The difference between a series and a sequence is that a sequence is a list of terms, where a series is an indicated sum of the terms of sequence. In section 13.3 we will consider finite series and their sums.
Formulas The sum of the first n terms of an arithmetic series is:
Ex. Find S 50 of the arithmetic series… …
Formulas The sum of the first n terms of a geometric series is: Where r is the common ratio and r ≠ 1
Ex. Find the sum of …
Find the sum of all positive 3-digit integers that are divisible by 8. Example:
Example: Find the sum of the first 10 terms of the geometric series 2 – – 54 + …