Question

What is the domain of f(x) = sqrt x - 7? Help!!

Answer 1

all values of x that will make the expression inside the square root sign nonnegative. Is it \[f(x)=\sqrt x-7\]or \[f(x)=\sqrt{x-7}\]

Answer 2

its the second one

Answer 3

ok... :D now let see. from what i have said previously, we must have \[x-7\ge0\]then\[x \ge 7\]

Answer 4

that's what I got lol