I can't figure out how to write the domain of r(x)=|-3+x| in interval notaion

Question

I've been on this question for the past 30 mins and i don't want to give up. r(x)=|-3+x|

 

Answer 1

Hi Jorge,

 

We can write

-3 + x = 0 or

-(-3 + x) = 0

 

The domain is all real numbers as there is no value of x that would make this function undefined. In interval notation, we can write it as  (-∞, ∞)