Geometric Sequence

Which of the following is a geometric sequence?

• 1, 4, 7, 10, ...

• 1, 2, 6, 24, ...

• 1, 1, 2, 3, ...

• 1, 3, 9, 27, ...

Is the sequence 2, 4, 12, 48,... geometric?

• yes
• no

Find the next three terms: -4, -12, -36, -108, ...

• 36, -108, 324
• -324, -972, -2916
• 324, -972, 2916
• -108, 324, -972

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

What is the common ratio for the following sequence:

3, 15, 75, 375, ...

• 12

• 1/5

• 5

• 3

Find the common ratio for the geometric sequence.

• 10
• 1/2
• 2
• 4

What is the common ratio for the sequence:
28, 14, 7, 3.5...

• 2
• 1/2
• -14
• -7

which sequence has a common ratio of -2?

• 4, 8, 16, 32

• 4, -8, 16, -32

• 32, 16, 8, 4

• -32, 16, -8, 4

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

• r = -4
• r = 2
• r = -2
• r = 4

Which formula is used to find the explicit equation for geometric sequences?

• U_n = U_n-1 + d

• U_n = U_n-1 * r

• U_n = a + (n-1)d

• U_n = a * r^n-1