The function given to us is[tex] f(x)=12x+3 [/tex]. As we can see this is a linear function and thus, it function will have no value of [tex] x [/tex] such that the function is undefined there. Therefore, the given function's domain will be the set of all real numbers. In other words, this can be written as:
Domain of f(x): \mathbb{R}
Thus, D:\left \{ x:x\in \mathbb{R} \right \}
where symbols have their usual meanings.
