Answer:
I believe that the answer is D.
Step-by-step explanation:
Hope this helps!
Answer:
Add all of them together
Step-by-step explanation:
You have to add the numbers and that gives you the sum
Answer:
Im trying to say the same thing
Step-by-step explanation:
This is geometric with a common ratio of 3 (3/1 = 3 and 9/3 = 3 etc)
the formula for the nth term is
an = 3^(n-1)