Answer:
The
of the sequence

The
of the sequence

Step-by-step explanation:
<u><em>Explanation:-</em></u>
Given that the geometric sequence
5, 25 , 125 ,....
First-term a= 5
Difference 
The
of the sequence

The
of the sequence

The answer to you question is yes
So, you substitute every x in g(x) for 5x.
2(5x)^2 + 5
10x^2 + 5