What is the domain of f(x) = 3x?

Answer:C. All real numbers.Step-by-step explanation:We have been given a function [tex]f(x)=3^x[/tex]. We are asked to find the domain of our given function.We know that domain of a function is all values of x for which a function is real and defined.We know that the domain of an exponential function is all real values of x that is [tex](-\infty,\infty)[/tex].Since our given function is an exponential function, therefore, domain of our given function is all real numbers.