Question

What is the domain of the function?
y = √3x+3
x ≤ – 1
x > 1
x ≥ –1

Answer 1

If we get -1, we might get confused because of complex numbers. So, we have only one option i.e., x > 1

Answer 2

You cannot take the square root of a negative number. So 3x+3 must be 0 or positive.


which means that,


3x+3 >= 0

3x+3-3 >= 0-3

3x >= -3

3x/3 >= -3/3

x >= -1


So the answer is choice C