Question

If the domain of the square root function f(x) is x<7, which statement must be true?

7 is subtracted from the x-term inside the radical.
The radical is multiplied by a negative number.
7 is added tihe radical term.
The x-term inside the radical has a negative coefficient.

Answer 1

The x-term inside the radical has a negative coefficient

Explanation:

The argument of a square root should be ALWAYS greater or equal to zero. If the domain of the function is x<7, rearranging, we have: 0<x-7

Therefore the argument is: x-7, and the function is: y = √(x-7)

The statement "The x-term inside the radical has a negative coefficient" is the right answer.