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May 29, 2015

Homework Help: math

Posted by Anonymous on Tuesday, May 24, 2011 at 3:29pm.

Which of these is not a geometric sequence?
3, 6, 12, 24, ...
250, 50, 10, 2, ....
5, 15, 45, 135, ...
4, 12, 20, 28, ...

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