Geometric sequence

Find the common ratio for the geometric sequence.

• 10
• 1/2
• 2
• 4

Is the sequence -432, 72, -12, 2,...geometric?

• yes
• no

What are the next 3 terms in the following geometric sequence:

512, 256, 128, ___, ___, ___, ...

• 1024, 2048, 4096

• 32, 8, 2

• 64, 32, 16

• 92, 66, 38

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

Find the first four terms of the sequence given the rule:
a_n = 4(5)^n-1

• 20, 100, 500, 2500
• 5, 20, 80, 320
• 4, 20, 100, 500
• 4, 9, 14, 19

Find the common ratio for the geometric sequence.

• 1
• -1
• 7
• -7

Find the common ratio for the geometric sequence.

• -4
• 4
• 1/4
• -1/4

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

Find the common ratio for the geometric sequence.

• 2
• -2
• 1/2
• -1/2

Find the common ratio: 4, -16, 64, -256, ...

• r = -4
• r = 2
• r = -2
• r = 4