Question

Find domain and range of f(x)=sqrt x+3?

Answer 1

just to clear it up: \[f(x) = \sqrt{x+3}\]

Answer 2

\(x+3 \ge 0 \implies x \ge -3 \implies x\in [-3,\infty)\)

Answer 3

that's the range, right?

Answer 4

what about 1/(x+3)^2?

Answer 5

That's domain.

Answer 6

Why don't you post it as a new question?