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For the geometric series 4+20+100+500 what is the value of a3?
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For the geometric series 4+20+100+500 what is the value of a3?

User David Rosson
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Every term in a sequence is denoted by a1 being the first one, a2 the second one, a3 the third one and so on. So in your case, a3 means, which one is the third term? So 100 would be your answer.
User Ben Thomas
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