Question

The domain f(x)=4x+9 consists of all real numbers, represented in interval notation as ??

Answer 1

You can just write it as \((-\infty, \infty)\)

Answer 2

What?! Is this obvious?! Lol

Answer 3

Lol, pretty much :P

Answer 4

hint:

Answer 5

WHY MUST THESE PEOPLE TRICK US!!!!?

Answer 6

the answer of @iGreen is the right answer!

Answer 7

it is a notation, and like all notations, it is a symbolic writing

Answer 8

Please, when you think about that notation, you have to keep in mind my drawing above

Answer 9

Will the domain always be that way? In these problems? @Michele_Laino

Answer 10

if your function is similar to f(x) = 4x+9, namely a linear function, the answer is yes!