Question

Determine the domain of the function.

f(x)= sqrt of 7+x

Answer 1

Df=[-7,∞)

Explanation:

Answer 2

x∈R {x ≥ -7}

Explanation:

The domain of the function can only include real numbers. This means whatever happens under the square root sign (i.e. the radicand) cannot be less than 0 (since you can't take the square root of a negative number).

To find the domain, set the radicand ≥ 0:

7 + x ≥ 0

x ≥ -7