Sequences Review

Given 
a_n = 3(2)^(n-1),      
what is the 14th term?

• 14
• 24,576
• 49,152
• 3,188,646

Which sequence is represented by the explicit formula a_n = 2(7)^n-1 ?

• 7, 14, 28, 56...
• 2, 9, 16, 23...
• 2, 14, 98, 686...
• 7,9,11,13...

What is the common difference:
-2, -11, -20, -29...

• Every Number
• 9
• -2
• -9

What is the next term:
6, 12, 18, 24...

• 30
• 32
• 34
• 6

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 a₉ in the sequence 4, 8, 16, 32, ... 

• 384
• 512
• 768
• 1,024

Determine whether the sequence is arithmetic, geometric, or neither: 
2, 8, 32, 128, ...

• arithmetic
• geometric
• neither

What type of sequence is the formula:
f(n+1) = f(n) - 3, f(1) = 20

• arithmetic
• geometric
• neither

Find the explicit formula.

• A

• B

• C

• D

Is the sequence arithmetic: -3, 3, -3, 3, ...

• Yes
• No