Arithmetic and Geometric Sequences Exam

What are the next 3 terms in this sequence of terms?     3, 7, 11, 15

• 18, 22, 26
• 19, 21, 23
• 19, 23, 27
• 18, 21, 24

Find the EXPLICIT arithmetic sequence formula for the following data set: 2, 4, 6, 8...

• 2n
• 2n - 2
• 2n + 4
• 4n

What is the previous term for:
-6, 1, 8, 15...

• -13
• 13
• 1
• -12

Find the 22nd term. a₁=10, d=5

• 115
• 200
• 10
• 220

What is the common ratio for the sequence:
28, 14, 7, 3.5...

• 2
• 1/2
• -14
• -7

Find the common ratio: 64, -16, 4, -1, ...

• r = -8
• r = -1/4
• r = -4
• r = 4

Given the sequence:
125, 25, 5, ....
Write the explicit rule:

•  y = (125)(5)^(x)
•  y = 125(1/5)^(x)
•  y = 625(5)^(x)
•  y = 125 + 5x

Is this sequence arithmetic, geometric, or neither?
1,2,4,7,11,16,22,...

• arithmetic
• geometric
• neither
• none of the above

Is the following a geometric series 1, 2, 4, 8,16,,,?

• Yes

• No

Create the explicit formula for the sequence:
2, 8, 14, ...
(Hint:  Write your formula and then simplify it.)

• a_n=2+6n
• a_n=-6+6n
• a_n=6n-4
• a_n=4-6n