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7-28.

Examine each sequence below. State whether it is arithmetic, geometric, or neither. For the sequences that are arithmetic, find the formula for . For the sequences that are geometric, find the sequence generator for .

  1. The sequence is neither arithmetic nor geometric.

  1. The sequence is geometric.

  1. Do the terms in the sequence increase by adding a constant amount or multiplying by a constant?

  1. See part (d).

    The sequence is arithmetic.

  1. See part (d).