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Arithmetic sequence
Pattern adds or subtracts the same number each time Difference stays the same Example 4 8 12 16 add 4 each time
Geometric sequence
Pattern multiplies or divides by the same number each time Ratio stays the same Example 4 12 36 108 multiply by 3 each time
Example sequence
5 10 20 40 80 pattern multiply by 2 geometric
Quick trick
Add or subtract → arithmetic Multiply or divide → geometric
TITLE
Geometric and Arithmetic Sequences 9 22 25