Sequences/Series Refresher

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

Find the 32nd term of this sequence.
34, 37, 40, 43, ...

• 32

• 64

• 127

• 356

Find the 32nd term of this sequence.
9, 4, -1, -6, -11, ...

• 81

• -34

• -146

• -225

What is the sum of the first 10 terms for the following geometric series:
2-6+18-54+...

• 59048

• -29524

• 524288

• 3069

What is the value of r for the following sequence.
1/2+1/4+1/8+1/16+...

• 2

• -2

• 1/2

• -1/2