Question

Determine the domain of the function. f(x)=square root of 7+x

a. x ≥ 0
b. All real numbers
c. x ≥ -7
d. x > 0

Answer 1

When finding the domain of a square root function that contains a radical, we know that the radicand (value under the radical) must be positive.
To find the domain set the radicand > = 0 and solve.
7 + x > = 0
Subtract 7 from both sides
x > = - 7
Letter C

Answer 2

The answer would be C