Poorly formulated question. Please provide a question as I am confused what you are asking.
Answer:
a = 15
Step-by-step explanation:
Answer:
slope = -4, y intercept = 1
Step-by-step explanation:
Hmmm... a geometric sequence MUST have a fixed common ratio. If it is changing, then the sequence you are looking at might not be a geometric sequence at all. We'd need to see an example to be sure.