Question

How do you find the domain of `f(x) =3sqrt(6x + 42)`?

Answer 1

`[-7,+oo)`

Explanation:

`"the domain is determined by the radical"`

`"that is "`

`6x+42>=0rArrx>=-7`

`rArr" domain is "[-7,+oo)`
graph{3sqrt(6x+42) [-10, 10, -5, 5]}