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3-82.
  1. Determine whether each of the following sequences is arithmetic, geometric, or neither. Then find a rule for the sequence, if possible. Homework Help ✎

    1. 12.2, 13, 13.8, …

    2. 90, 81, 72.9, …

    3. 1, 1, 1, …

    4. 2, 4, 16, …

See problem 3-46 for examples and hints.

This could be either arithmetic or geometric. Why?

See part (a).

See part (a).