Which of the following is a geometric sequence?
Question 9 options:

A)

2, 6, 18, 54, 162, 486, ...

B)

1, 5, 9, 13, 17, ...

C)

0, 5, 10, 15, 20, ...

D)

5, 1, –3, –7, –11, –15, ...

Respuesta :

Answer:

A

Step-by-step explanation:

Geometric sequences are ones that have a common ratio (ie. the common ratio is multiplied by the previous term to get the next term).

In A, the common ratio is 3. 2 * 3 = 6. 6 * 3 = 18, etc.

In B, C, and D, they are arithmetic sequences.

That means that a number is added, not multiplied, by the previous term to get the next term.

B: 1 + 4 = 5, 5 + 4 = 9, etc.

C: 0 + 5 = 5, 5 + 5 = 10, etc.

D: 5 - 4 = 1, 1 - 4 = -3, etc.

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