To find the domain of the function f(n) = 5 - (2 × n), we need to consider all the possible values of "n" for which the function is valid or defined.

In this case, the function f(n) = 5 - (2 × n) is defined for all real numbers of "n." There are no restrictions or limitations on the values of "n" for which the function can be evaluated.

So, the domain of the function f(n) is all real numbers, or in mathematical notation, it can be represented as (- , + ).