Arithmetic and Geometric Sequence

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

• 8
• 11
• -11
• -8

The next term of the sequence 2,4,8,16 is

• 64

• 32

• 108

• 20

Is the sequence arithmetic: 78, 785, 7855, 78555, ...

• Yes
• No

Is the sequence 2, 4, 12, 48,... geometric?

• yes
• no

What is the common ratio for the sequence:
28, 14, 7, 3.5...

• 2
• 1/2
• -14
• -7

Find the 22nd term of the following sequence:
5, 8, 11, ...

• 14
• 68
• 63
• 71

Describe the sequence, find the 5th term, and write the rule

-8, -6, -4, -2...

• geometric, a₅ = 2, a_n = 2n - 10

• geometric, a₅ = 0, a_n = -10n + 2

• arithmetic, a₅ = 2, a_n = -10n + 2

• arithmetic, a₅ = 0, a_n = 2n - 10

-21, -16, -11, -6, ...

Is this sequence arithmetic, geometric, or neither?

• arithmetic (common difference d = 5)

• geometric (common ratio r = 5)

• neither

Find the 22nd term of the following sequence:
5, 8, 11, ...

• 14
• 68
• 63
• 71

Given the rule:  a_n = 7(½)^n-1
Identify the common ratio.

• a_n

• 7

• ½

• n-1