For the geometric sequence, find the common ratio, r.
-1, -3, 9, -27, 81, . . .
A) 9
B) -3
C) 3
D) -4

Name: For the geometric sequence, find the common ratio, r. -1, -3, 9, -27, 81, . . . A) 9 B) -3 C) 3 D) -4
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Question

Quizplus · Accepted Answer

The common ratio, r, can be found by dividing any term in the sequence by the previous term. For example, dividing the second term (-3) by the first term (1) gives -3, or dividing the third term (9) by the second term (-3) also gives -3. This shows that the common ratio is -3.

For the Geometric Sequence, Find the Common Ratio, R