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# Given the geometric sequence where a1 = 2 and the common ratio is 4, what is the domain for n?

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The general term is (a sub n; n is a subscript)The first term is a1The second term is a2The third term is a3and etc...The first term starts at n = 1. We replace the n with 1 to get . Something similar happens with n = 2 and onwardThe domain is, therefore, the set of {1, 2, 3, 4, 5, ...} that is the set of...* Counting numbers* Positive Integers* Natural numbersThose are three ways of expressing the same setWe also can say where n is a whole number or all of the numberA similar to the inequality would be that it is effectively the same as an idea, as the last inequality (n is also an integer, or an integer number).