Sequences

Find the sequence; 3, 9, 27, 81..............

• add 3

• multiply by 3

Find the sequence; 9, -18, 36, -72...........

• adding 9

• multiply by -2

Find the sequence; -2, 2, -2, 2, -2............

• Add -1

• multiply by -1

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

• Yes

• No

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

• yes

• no

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

• 8

• 11

• -11

• -8

Find the common ratio: 4, -16, 64, -256, ...

• r = -4

• r = 2

• r = -2

• r = 4

What is the 100th term in the sequence f(n)= 4n-12

• 388

• 40012

• -388

• 100

256, 128, 64, 32, ...

What's next?

• 24

• 18

• 16

• 8

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

Is this sequence arithmetic, geometric, or neither?

• arithmetic (common difference d = 5)

• geometric (common ratio r = 5)

• neither (no common difference OR common ratio) neither (no common difference OR common ratio)