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1. |
Determine whether the sequence 7, 21, 35, 49 is geometric. If so, find its common ratio. |
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A. |
geometric, r = 3 |
B. |
not geometric |
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C. |
geometric, r = 14 |
D. |
geometric, r = 7 |
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Hint |
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2. |
Determine whether the sequence 3, 12, 48, 192 is geometric. If so, find its common ratio. |
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A. |
not geometric |
B. |
geometric, r = 4 |
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C. |
geometric, r = 9 |
D. |
geometric, r = 3 |
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Hint |
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3. |
Find the next two terms of the geometric sequence 50, 40, 32, … |
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A. |
25.6, 20.48 |
B. |
26, 22 |
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C. |
28.5, 25.52 |
D. |
24, 16 |
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Hint |
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4. |
Suppose that the sixth term of a geometric sequence is 1215, and the first term is 5. What is the second term? |
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A. |
12.5 |
B. |
8 |
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C. |
9 |
D. |
15 |
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Hint |
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5. |
Find the geometric mean in the sequence 4, , 196. |
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A. |
7 only |
B. |
28 or –28 |
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C. |
7 or –7 |
D. |
28 only |
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Hint |
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