Question

Which value of xis in the domain of f(x) = √x – 7?

Answer 1

We are looking for values of x that will not make the equation undefined .Obviously the function has restrictions we have to make sure that x-7 is always ≥0 because it is under a square root

`x-7\geq 0\\x\geq 7`

The domain of the function is all the real numbers greater or equal to 7 .

x≥7 ε R