Question

f(x) means?

Answer 1

f (x) just mean a function of x

Answer 2

It's the resultant of a specific value of x when evaluated. Think f(1). This evaluates what happens when x=1.

Answer 3

f(x) is a mathematical object, a function, that associates each input x with exactly one output, f(x).

So you may think of it as a machine eating x's and spitting out y's where y = f(x) or as the y part of the ordered pair (x,f(x)).

Answer 4

a function of x

Answer 5

yes a function with variable x