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Which of the following is a geometric sequence? 1. 19, 15, 21, 27,... 2. 30, 15, 0, -15,... 3. 4, 9, 16, 25,... 4. 3,-9, 27,-81,...
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Which of the following is a geometric sequence?

1. 19, 15, 21, 27,...
2. 30, 15, 0, -15,...
3. 4, 9, 16, 25,...
4. 3,-9, 27,-81,...

User Steven Robbins
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1 Answer

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I believe it’s the 4th one: X(-3)
User StackBuck
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