Question

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

Answer 1

Answer:

$a_{n}=5\times \left( 7\right)^{n-1}$

Step-by-step explanation:

$a_{n}=a_{n-1}\times7$

Then the common ratio = 7

Then the explicit formula is :

$a_{n}=a_{1}\times \left( 7\right)^{n-1}$

    $=5\times \left( 7\right)^{n-1}$