Question

how do I find the domain of a square-root function?

Answer 1

if is in the numerator you want the inside to be bigger than or equal to zero
if the is in the denominator you want the inside to be bigger than zero

Answer 2

What is the function specifically? There are multiple ways for different functions.

Answer 3

f(x)=sqrt{x+1} domain is given by x+1>=0
g(x)=1/sqrt{x+1} domain is given by x+1>0

Answer 4

\[y=\sqrt{x+6}\]

Answer 5

well because the inside of the radical cannot be a negative, x goes from -6 to infinite, because I do not see any other restrictions

Answer 6

you find domain by doing x+6>=0

Answer 7

then I subtract 6 from both sides?

Answer 8

yes
and you will get x>=-6 which is what quantabee said

Answer 9

Ok Thank you!