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Tell whether the sequence is geometric. Explain why or why not.

1. 4, 16, 64, 256, 1024,...
2. -1/4, 3/8, -3/16, 1/32, -3/64, ...
3. 0.75, 1.5, 2.25, 3, 3.75, ...

1 answer

1. yes each term is 4 times the previous
2. 3/8 / -1/4 is not -3/16/ 3/8 so no
3. no for the same reason

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