How do you find the domain of x+4?

2 Answers
Mar 26, 2018

The domain is x4

Explanation:

Since square roots are only defined when the expression under the square root is non-negative, to find the domain we set the expression under the square root greater than or equal to zero:

x40
x4

Mar 26, 2018

[4,)

Explanation:

Firstly you know that there can't be a negative under a square root 1 any negative leads to the function being undefined

So when x+4<0 i.e. it is lower than zero you know there is no domain

So when x+40 the domain exists so it eixsts when x4

So the domain is [4,)