Sequences

What do we call this sequence: 6,18,54,162,…

• Arithmetic Sequence

• Geometric Sequence

What do we call this sequence: 1, 31, 61, 91,...

• Arithmetic Sequence

• Geometric Sequence

What kind of sequence is illustrated below?
 400, 200, 100, 50, 25, ...

• Arithmetic
• Geometric
• Neither

Given the sequence 2, 8, 14, 20, 26, ... What is the common difference?

• 2

• 4

• 6

• 8

Identify the common ratio for this Geometric Sequence:

6, 12, 24, 48

• 2

• -2

• 4

• 6

Find the common ratio of the following geometric sequence:

64, -16, 4, -1, ...

• r = -8

• r = -1/4

• r = -4

• r = 4

What is the common difference of the following sequence?

7, 27, 47, 67,...

• 10

• 20

• 3

• -20

Write the explicit formula for the sequence shown below.

1, 6, 11, 16

• a_n=1+5(n-1)

• a_n=1−5(n-1)

• a_n=5−(n-1)

• a_n=5+(n-1)

Write the explicit formula for the geometric sequence.

• a_n = 4(3)^n-1
• a_n = 3(4)^n-1
• a_n = -4(3)^n-1
• a_n = 3(-4)^n-1

What does a₁ represent?

• Any term

• First term

• Last term