Question

How do you find the domain of `sqrt(2x+4)`?

Answer 1

The argument of a radical may not be negative.

Explanation:

`->2x+4>=0->2x>=-4->x>=-2`

There is no restriction in the upward direction, so the range is:
`-2<=x < oo` or `[-2,oo)`, the `[` meaning 'inclusive'