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

Expert Answers
baxthum8 eNotes educator| Certified Educator

Domain of:  `f(x) =sqrt(x) - 7`

We can not have negative values for a radical in a function therefore, our possible inputs for this function has to be anything greater than or equal to zero.

Can not have:  `sqrt(-5)`

Therefore we say that domain is all real numbers greater than or equal to 0.

So:  `{x|x>=0}`