Final answer:
The domain of the logarithmic function f(x) = log2(x - 3) is all x-values greater than 3 because the logarithm of a non-positive number is undefined.
Step-by-step explanation:
The domain of a function is the set of input values (x-values) for which the function is defined. For the logarithmic function f(x) = log2(x - 3), the argument of the logarithm (x - 3) must be positive because the logarithm of a non-positive number is undefined. Therefore, the domain of the function is all x-values such that x - 3 > 0, which simplifies to x > 3.