Algebra-1

To determine which sequence has a common ratio of 2, we need to check if each term is obtained by multiplying the previous term by 2.

Let's examine each sequence:

A. (3, 6, 12, ...)
   The second term, 6, is obtained by multiplying the first term, 3, by 2.
   The third term, 12, is obtained by multiplying the second term, 6, by 2.
   Therefore, this sequence has a common ratio of 2.

B. (3, 9, 27, ...)
   The second term, 9, is not obtained by multiplying the first term, 3, by 2.
   ...