How do you find the domain of $f(x)=sqrt(x+4)$ ?

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Answer 1 · 2016-02-16T16:36:14

$x in [-4, +oo[$

You have a square root, so the function inside it must be equal or larger than zero:

$x+4>=0$

$x>=-4$

$x in [-4, +oo[$

How do you find the domain of f(x)=sqrt(x+4)f(x)=sqrt(x+4)?