Sequences Review

Which sequence is arithmetic?

• 4, 8, 16, 32, 64, ...
• 4, 6, 10, 12, 16, ...
• 4, 1, -2, -5, -8, ...
• 4, 2, 1, 1/2, 1/4, ...

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

• 14
• 68
• 63
• 71

Find the missing terms of the arithmetic sequence:
145, ___, ___, ___, 205

• 160, 175, 190
• 165, 185, 195
• 155, 165, 175
• 190, 175, 160

What is the twelfth term in the sequence 3, -6, 12, . . . ?

• -2,048
• 6,144
• -6,144
• -531,441

Find S_n for the given series:
a₁=22
d=-8
n=21

• 1911
• -1449
• -2436
• -1218

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

• Yes
• No

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

• 64

• 32

• 108

• 20

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 next three terms: 4, 12, 36, 108, ...

• 324, 972, 2916
• 972, 2916, 8748
• 405, 1215, 3645