Sequences and Sigma Notation

Classify the following sequence as arithmetic, geometric, or neither:

-9, -6, -3, 0, 3, 6, ...

• Geometric

• Arithmetic

• Neither

Classify the following sequence as arithmetic, geometric, or neither:

1, 1, 2, 3, 5, 8, 13, ...

• Arithmetic

• Geometric

• Neither

Find the next term of the sequence:

2, 2, 4, 6, 10, 16,...

• 28

• 26

• 24

• 22

• 63

• 72

• 81

• 144

• 58

• 60

• 62

• 124

Is the sequence arithmetic: 37, 31, 25, 19, ...

• Yes
• No

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

• 8
• 11
• -11
• -8

Given the sequence:
 25, 21, 17, 13,...
Write the explicit equation that models the sequence.

• a_n = 4n + 29
• a_n = -4n + 25
• a_n = -4n + 29
• a_n = 4n + 25

Given the recursive formula, find the first four terms:
a_n = a_n-1 + 5
a₁ = -16

• -16, -21, -26, -31
• 5, -11, -27, -43
• -16, -80, -500, -200
• -16, -11, -6, -1