Arithmetic and Geometric Sequences

Decide if the sequence is arithmetic, geometric or neither:
10, 20, 30, 40, . ..

• Arithmetic

• Geometric

• Neither

Geometric sequences involve

• multiplication and division

• multiplication and addition

• addition and subtraction

• subtraction and division

Which kind of sequence has a common difference?

• Arithmetic

• Geometric

What is the common ratio of the geometric sequence?

-3, 12, -48, 192, -768, . . .

Mathematical Equivalence

ON

Match the following sequences with their common ratios.

• Sequence: 28, 14, 7, 3.5...

• -14

• Sequence: -7, 49, -343...

• 2

• Sequence: -14, 196, -2744...

• -7

• Sequence: 2, 4, 8, 16...

• 1/2

What is the common ratio of the geometric sequence?

Mathematical Equivalence

ON

Is the sequence geometric or arithmetic?
3, 6, 9, 12...

• Arithmetic

• Geometric

• Neither

Is the sequence geometric or arithmetic?
6, 18, 54...

• Arithmetic

• Geometric

• Neither

Is this arithmetic, geometric or neither. 
30,39,48,57,66,...

• Arithmetic

• Geometric

• Neither

• There's a difference???

Identify the common difference. 
10, 20, 30, 40, ...

• 5

• 10

• 15

• 20