The exponential function that models how much Smith gets after each day is given by:
[tex]A[n] = R1(2)^n[/tex]
It is modeled by:
[tex]y = ab^x[/tex]
In which:
In this problem:
Thus, the equation as a sequence is represented by:
[tex]A[n] = R1(2)^n[/tex]
More can be learned about exponential functions at https://brainly.com/question/25537936