Question

If f(x)=square root x-3, which inequality can be used to find the domain of f(x)? A square root x-3 =>0 B x-3=>0 C square root x-3<=0 D x-3<=0

Answer 1

the answer is x-3=>0 i just took the quiz

Answer 2

we have

`f(x)=√(x-3)`

we know that

The term in the root square can not be a negative number

so

`(x-3)\geq0\\x\geq3`

the domain is the interval----------> [3,∞)

therefore

the answer is the option

B (x-3)=>0