Question

Determine whether the following sequence is arithmetic, geometric, or neither.

-7, -14, -28, -56,

Answer 1

Answer: Geometric

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Explanation:

To go from term to term, we are multiplying by 2

-7 * 2 = -14

-14 * 2 = -28

-28 * 2 = -56

This means the common ratio is 2 and this sequence is geometric.

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Alternatively, you can divide each term by its prior term

-56/(-28) = 2

-28/(-14) = 2

-14/(-7) = 2

Each time we get the same result showing the common ratio is 2.

Answer 2

Answer:

Geometric

Step-by-step explanation:

It multiplies by two each time