How do you find the domain of $sqrt(x+7 )$ ?

Question

8909 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-12-31T11:22:11

$D_f=[-7,oo)$

here, $x+7>=0$

So, $x>=-7$

$D_f=[-7,oo)$

Answer 2 · 2017-12-31T11:25:30

$x inRR,x>=-7$

$x+7>=0$

$rArrx>=-7$

$"domain is "x inRR,x>=-7$
graph{sqrt(x+7) [-10, 10, -5, 5]}

How do you find the domain of sqrt(x+7 )sqrt(x+7 )?