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Geometric Sequences

Authored by David Brackmann

Mathematics

10th - 12th Grade

Used 4+ times

Geometric Sequences
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12 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

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

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

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

yes
no

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

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

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

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Find a12 in the sequence -1, -3, -9, -27, ...

-177,147
-19,683
-59,049
118,098

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

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

2
1/2
-14
-7

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the recursive formula for the sequence:

11, 22, 44, 88...

an = 2(11)n-1

an = 11x 2

an = 11(2)n-1

an = 2an-1

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Given the geometric sequence with a common ratio of ⅓ and the fifth term is 54, find the first term.

162
486
4374

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