Answer:
Option 2

Step-by-step explanation:
Given : The functions
and
combine them to create a geometric sequence, an
To find : The 9th term
Solution :
The two function are :

We have to form a geometric sequence by combining f(n) and g(n).
So, the sequence having nth term is

........[1]
Now, we put n=1,2,3,... to make a sequence
Put n=1 in [1]






The formula of nth term in geometric sequence is

Put n= 9 to find 9th term



Therefore, Option 2 is correct.
