In a geometric series, t1=12 and S3=372. What is the greatest possible value for t5? Justify your answer.

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asked by Carol
  1. The formula for the sum of n terms with a common ratio of r is
    In particular, S3=372, t1=12

    r=5, or r=-6

    case r=5

    case r=-6

    Make your choice of the answer and justify.

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