Which explains why the sequence 216, 12, 2/3 is arithmetic or geometric.

A. The sequence is geometric because it decreases by a factor of 6.

B. The sequence is arithmetic because it decreases by a factor of 6.

*C. The sequence is geometric because it decreases by a factor of 1/18.

D. The sequence is arithmetic because it decreases by a factor of 1/18.

Question

Maryjane White

Mathematics

8 July, 00:15

Which explains why the sequence 216, 12, 2/3 is arithmetic or geometric.

A. The sequence is geometric because it decreases by a factor of 6.

B. The sequence is arithmetic because it decreases by a factor of 6.

*C. The sequence is geometric because it decreases by a factor of 1/18.

D. The sequence is arithmetic because it decreases by a factor of 1/18.

+5

Answers (1)

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Ellison · Answer 1

C, because every time you multiply the preceding number by 1/18, you get the next number in the sequence. It's not D, because an arithmetic sequence would be 216-1/18 (a difference of 1/18) rather than it decreasing by a factor.