Question

Which of the following is the domain of the square root function?

x≤ 0
x> 0
x≥ 0
all real numbers

Answer 1

Looks easy but its wierd.

Answer 2

Maybe you need to google?

Answer 3

ok thanks

Answer 4

You might want to graph the square root function, or at least look it up.
Next, review "domain." What does this word mean in the context of functions?

Answer 5

Remember that domain refers to the valid values for x when taking the square root of x.

Answer 6

What is the square root of zero (0)?
What is the square root of -9?
What is the square root of 4?
A simple experiment like this one may help your understanding of the domain of the sqrt function.