Arithmetic and Geometric Sequences

Which kind of sequence has a common difference?

• Arithmetic

• Geometric

Is this sequence arithmetic, geometric, or neither?
{26, 22, 18, 14, ...}

• Arithmetic

• Geometric

• Neither

What is the eleventh term of an arithmetic sequence in which a1 = 3 and d = 6?

• 63

• 39

• 69

• 36

Which kind of sequence has a common ratio?

• Arithmetic

• Geometric

• 315

• 330

• 345

• 360

• Arithmetic

• Geometric

Answer explanation

Percentages are almost always Geometric.

Identify the common difference.
97, 86, 75, 64, ...

• 8

• 11

• -11

• -8

What is the common ratio: 5, 25, 125, 625...

• 25

• 20

• 5

• 4

Which sequence is an arithmetic sequence?

• 3, 6, 2, 7, ...

• 3, 6, 12, 24, ...

• 3, 6, 10, 15, ...

• 3, 7, 11, 15, ...

This is an arithmetic sequence. 5, 2, –1, –4, . . .

What is a_{7 (7th term)} ?

• -13

• -11

• -18

• -22