Answer: The correct option is 1, i.e.,
.
Step-by-step explanation:
The geometric sequence is in the form of,
![a,ar,ar^2,ar^3,....](https://img.qammunity.org/2019/formulas/mathematics/middle-school/m7w3jltwc8ed1xmeyplkfzzo414zy2uob0.png)
Where, a is the first term of the sequence and r is the common ratio of the sequence.
It means the
term of the sequence is defined as,
![a_n=ar^(n-1)](https://img.qammunity.org/2019/formulas/mathematics/high-school/6wjqcdlxalv9afca626tnih82g711mt3cm.png)
So the the
term of the sequence is defined as,
![a_(n+1)=ar^n](https://img.qammunity.org/2019/formulas/mathematics/middle-school/17toxvlb9cegbeydh662lnlp3bigrz2u36.png)
![a_(n+1)=r(ar^(n-1))](https://img.qammunity.org/2019/formulas/mathematics/middle-school/8ahsbmrx64pom2ygh01qcp5g6f4rmv95qj.png)
![a_(n+1)=ra_n](https://img.qammunity.org/2019/formulas/mathematics/middle-school/llvwkugg7jye5rs11ugw6mysh8055j90fe.png)
It means the geometric sequence is in the form of,
![f(x+1)=rf(x)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/nmwu5t9wida44zsjujw1nfbhsxbjhhtup7.png)
Where, r be any constant.
From the options only
is in the form of
with common ratio
.
Therefore, the function can be used to model the graphed geometric sequence is
.