Final answer:
In the context of sequences, the domain usually consists of natural numbers representing the positions of terms. Since negative numbers are not used as positions in a sequence, option A, which is -5, is not a possible term in the domain of a sequence.
Step-by-step explanation:
The question asks us to identify which term is not possible in the domain of a sequence among the options given. The domain of a sequence consists of all possible values that we can use as input to the sequence, typically represented by natural numbers since sequences are often defined as a function from the natural numbers to real numbers.
According to the information provided, if we denote the first term of the sequence as f(1) and it is equal to 5 A, and the thirteenth term, f(13), is equal to -2 A, we can deduce that the sequence follows some pattern based on the term number and the multiplier A. The negative term at f(13) suggests that there may be alternating signs or other patterns at play. However, this information does not explicitly give us the rule defining the entire sequence.
However, since we're talking about the domain of a sequence and options A, B, C, and D represent possible term positions, we note that negative numbers are not usually positions in a sequence. Sequences generally start from the first term and increase sequentially from there. Therefore, term -5 could not typically represent a position in the domain of a sequence, which makes option A (-5) not possible for the domain of a sequence.
The correct answer is: A. -5