Algebra 1P Arithmetic and Geometric Sequences

Which of the the following are examples of arithmetic sequence?

What is the common difference of the arithmetic sequence 18,24,30,36, ...?

(a)  

In the sequence 9, 18, 27, 36 and so on, what is the common difference?

• 5

• 7

• 9

• 11

If the sequence 4, 8, 12, 16 continues, what will be the 7^th term?

• 24

• 28

• 32

• 36

Find the next three terms in the arithmetic sequence: -33, -24, -15, -6, ...

• -1, 7, 15
• -5, 2, 9
• 3, 12, 21
• -65, -73, -81

Given the sequence:
 25, 21, 17, 13,...
Write the explicit equation that models the sequence.  (Hint:  Simplify your equation.)

• a_n = 4n + 29
• a_n = -4n + 25
• a_n = -4n + 29
• a_n = 4n + 25

Which of the following sequences is geometric?

• -3, 3, -9, 15, ...

• -1, 1, 4, 8, ....

• 1, -5, 25, -125, ...

• 10, 12, 15, 19, ...

What is the common ratio of the sequence -4,12, -36, 108, ...?

• 2

• -2

• 3

• -3

Which of the following formulas would generate the sequence 2, -10, 50, -250, ....?