Question

What is the domain of the function f(x) = 2x + 5?

Answer 1

(- infinitive + infinitive)
(x|x e R)

Answer 2

Here, Function, f(x) = 2x + 5

Let, y = 2x + 5
Subtract both sides by 5,
y - 5 = 2x

Now,Divide both sides by 2,
y/2 - 5/2 = x

Since,Range is the set of all valid y values, It could be anything here!

In short, Your Answer would be: (-∞, ∞)

Hope this helps!