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

Solution:

Given function is 

f(x) = 2x + 5

The domain of the function is the set of all the values that it can take.

Here f(x) takes any real number as its input.

The domain of f(x) = 2x + 5 is (-∞, ∞)

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

Summary:

The domain of the function f(x) = 2x + 5 is (-∞, ∞)