Arithmetic and Geometric Series and Sequences

Identify the common difference in the given arithmetic sequence.

10, 20, 30, 40, ...

• 5

• 10

• 15

• 20

Given the sequence: 25, 21, 17, 13,... Write the explicit equation that models the sequence. HINT: It is an arithmetic Sequence

• a_n = 4n + 29

• a_n = - 4n + 25

• a_n = - 4n + 29

• a_n = 4n + 25

The next two terms of the sequence 4,7,10,13 are ....

• 16 and 19

• 15 and 19

• 16 and 18

• 15 and 18

Is the sequence arithmetic: 17, 9, 1, -7, ...

• Yes

• No

Which formula represents this arithmetic sequence:

• 4n

• n + 6

• 3n + 2

• 5n - 2

What is the common ratio of the geometric sequence below?
5, 25, 125, 625...

• 25

• 20

• 5

• 4

What is the 8th term in the geometric sequence below?

• 19,683

• 6,561

• 2,187

• 729

What is the common ratio in this geometric sequence?

{96, 48, 24, 12, ... }

• 1/2

• 2

• 12

• 24

Which kind of sequence has a common ratio?

• Arithmetic

• Geometric

An arithmetic sequence has a₁₅=160 and a common difference of -15. Find a₄₀.

• 535

• -170

• 370

• -215