Sequences Practice

In recursive formulas what does the term a_n-1 represent?

• the previous term

• the term you are looking for

• the first term

• the last term

In recursive formulas what does the term a₁ represent?

• the previous term

• the term you are looking for

• the first term

• the last term

Write a recursive formula for the sequence 17,13,9,5...

• a₁ = _17_ , a_n=a_n-1 - 4 __

• a₁ = _13 , a_n=a_n-1 - 4_

• a₁ = _-4 , a_n=a_n-1 -17__

• a₁ = _13 , a_n=a_n-1 +4 ____

• 4

• 1

• 18

• 114

• 24

• 7,776

• 48

• 96

Determine if the following sequence is arithmetic or geometric.

6, 30, 150, 750, ...

• Arithmetic

• Geometric

Determine if the following sequence is arithmetic or geometric.

2, 5, 8, 11, 14, ...

• Arithmetic

• Geometric

Write the explicit formula for the sequence.

10, -2, -14, -26, ...

Find the first four terms of the sequence.

a_n= 3(4)ⁿ

• 12, 48, 192, 768

• 12, 144, 1728, 20736

• 12, 24, 36, 48

• 3, 12, 48, 192

Write the recursive formula for 6, 17, 28, 39, 50....

• a_n=a_n-1+11
  a₁=6
• a_n=a_n-1-4
  a₁=6
• a_n=a_n-1+9
  a₁=6
• a_n=a_n-1+6
  a₁=6