Answer:
Common ratio, r=-3
Recursive Formula

Step-by-step explanation:
The formula for the geometric sequence:
is given as:

<u>Common Ratio</u>
Dividing the next terms by the previous terms, we obtain:

Therefore, the common ratio of the sequence, r=-3
<u>Recursive Formula</u>
We observe that the next term,
is obtained by the multiplication of the previous term. f(n-1) by -3.
Therefore, a recursive formula for the sequence is:
