Question

A^1 =5, a^n = a^n-1 (7) explicit formula

Answer 1

`a_(n)=5* \left( 7\right)^(n-1)`

Explanation:

`a_(n)=a_(n-1)*7`

Then the common ratio = 7

Then the explicit formula is :

`a_(n)=a_(1)* \left( 7\right)^(n-1)`

`=5* \left( 7\right)^(n-1)`