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Algebra 10 Online
OpenStudy (anonymous):

Which series are neither arithmetic nor geometric? Choose ALL answers that are correct. (You can choose multiple answers) (A) 20 + 40 + 80 + 140 + 220 +... (B) 20 + 60 + 100 + 140 + 180... (C) -20 + 60 - 180 + 540 - 1620 +... (D) -20 + 200 - 40 + 400 - 80 +...

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