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To find the common ration in a geometric sequence, divide one term by its preceding term:

r = -18 ÷ 6 = -3
r = 54 ÷ -18 = -3
r = -162 ÷ 54 = -3
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7y ago
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7y ago

It is -3.

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Q: What is the r value of the following sequence 6 -18 54 -162?
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