What is the common ratio of the sequence?-2, 6, -18, 54,...
Answer
A
−3
B
−2
C
3
D
8
Explanation
Divide each term by the term before it to find the common ratio: 6 ÷ (−2) = −3. Checking the next pair, −18 ÷ 6 = −3, so the common ratio is −3, choice A.
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