Sequences and series

-5, -1, 3, 7, 11
What is the recursive rule?

•   $a_n=a_{n-1}\ +\ 4$  

•   $a_n=a_{n-1}-9$ 

•  $a_n=a_{n-1}-5$  

•  $a_n=a_{n-1}-4$  

Write the recursive formula: 
-3, -9, -15, -21, ...

• a_n = a_n-1 - 6, a₁=-5
• a_n = a_n-1 - 6, a₁=-11
• a_n = a_n-1 - 6, a₁=-3
• a_n = a_n-1-4, a₁ = -11

An arithmetic sequence is shown...

8, 14, 20, 26, 32...

What is the recursive formula that was used to create this sequence?

Select the recursive formulas.

• an = r • an-1

• an= a1 + d (n - 1)

• an= an-1 +d

• an= a1 • rn-1

Write the recursive definition for the following geometric sequence:

48, 72, 108, 162, 243...

What are the next 2 terms in the following pattern
100, 77, 54, 31... 

• 18, -3
• 8, -13
• 15, -7
• 5, -18

Write the recursive formula: 
13, 22, 31, 40, ...

• a_n = a_n-1 + 11, a₁ = 13
• a_n = a_n-1 + 9, a₁ = 31
• a_n = a_n-1 + 9, a₁ = 22
• a_n = a_n-1 + 9, a₁ = 13

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

Determine the next 3 terms of the arithmetic sequence:

14, 9, 4, -1, ...

• -5, -10, -15

• -4,-9,-14

• -6, -11, -16

• 5, 10, 15