The domain of radical functions only includes values for which the radicand is non-negative.
{ x | x ≥ 3 }
The domain of radical functions only includes values for which the radicand is non-negative.
y=sqrt(x-3)
We can solve for these values of x by only looking at the radicand.
x-3 ≥ 0 ⇔ x ≥ 3
The domain is all real numbers greater than or equal to 3.
