Answer:
n belongs to set of natural numbers
Step-by-step explanation:
Given the geometric sequence
[tex]a_n = 2(−3)^n − 1,[/tex]
Here an denotes the nh term.
Naturally, n cannot be 0 or negative.
Because the first term has n =1, and so on.
Domain for n is the set of all natural numbers
n = 1,2,3.....
