Arithmetic Series Lesson

Multiple Choice

The dots in a dice form a/an _________ sequence.

• arithmetic

• geometric

​Arithmetic Sequence: 1, 2, 3, 4, 5, 6

Arithmetic SERIES: 1+2+3+4+5+6

​Can you find the the sum of this series in just 1 minute?

1+2+3+4+5+…+100

​S_n = sum of n terms

n = number of terms

a₁ = first term

d = common difference

Ex. 1. Find the sum of the series.

6+11+16+21+26+31+36

Ex. 2. Find the sum of the first 20 terms of the sequence:

7, 9, 11, 13, …

​Your turn…

​Homework: Submit on Thursday!