Given the geometric sequence where a1 = −3 and the common ratio is 9, what is the domain for n? a) all integers b) all integers where n ≥ −1 c) all integers where n ≥ 1 d) all integers where n ≥ 0

Option C - All integers , where                          

Step-by-step explanation:

Given : The geometric sequence where  and the common ratio is 9,

To find : What is the domain for n?

Solution :

First we form a geometric sequence,

The nth term of geometric sequence is

First term in GP,  

Common ratio, r = 9

Substitute the value,

Now, what you get domain of is all natural numbers e.g., n = {1, 2, 3, ......}

so, domain for n will be all integers where n ≥ 1

Hence, option (C) is correct.

faster, im not sure why but i know it is faster