SOLUTION: tell whether the sequence 3, -9, 27, -81 is geometric

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Question 880176: tell whether the sequence 3, -9, 27, -81 is geometric
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
3%2A%28-3%29=-9;
%28-9%29%2A%28-3%29=27;
27%2A%28-3%29=-81.

YES. Geometric.