Question

Determine whether the following sequence is arithmetic, geometric, or neither.
-7,-14,-28,-56​

Answer 1

Geometric sequence

Explanation:

We can see that each term is double the preceding term

-14 = -7 x 2

-28 = -14 x 2

-56 = -28 x 2

Such a relationship where each term is a multiple of the previous term and is constant for all terms is a geometric sequence

The common ratio which is the constant multiple is 2 in this sequence