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9 November, 21:13

Which of these is not a geometric sequence?

A: 3, 6, 12, 24, ...

B: 250, 50, 10, 2, ...

C: 5, 15, 45, 135, ...

D: 4, 12, 20, 28, ...

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Answers (1)
  1. 9 November, 21:37
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    Choice D isn't a geometric sequence. There isn't a common ratio between 4,12,20,28.
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