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Sagot :

Answer:

  1. neither
  2. arithmetic
  3. geometric
  4. arithmetic
  5. geometric

Step-by-step explanation:

Arithmetic sequences have a common difference. Geometric sequences have a common ratio.

The difference is found by subtracting a term from the next. If successive differences are all the same, they are "common."

The ratio is found by dividing a term by the one before it. If successive ratios are all the same, they are "common."

1.

There is no common ratio or common difference: neither.

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2.

The common difference is 14: arithmetic.

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3.

The common ratio is -2: geometric.

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4.

The common difference is -6: arithmetic.

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5.

The common ratio is 1/8: geometric.