Thread: domain question

Hey everybody, I just had a quick question about domain and how to write them in interval notation (I think that's what it's called).

So I have one problem,


For this problem I got the domain:


For the other problem,


with this domain:


My question is this: why are there two 'U' in the first domain but not the second one? Have I just written the second one incorrectly? Any help is appreciated!

Originally Posted by sciencefun

in the second domain function,you forgot to include:
(-3,4) as your domain.

Ok I had a feeling I had that second one wrong. So would the middle part always be included in every domain?

Originally Posted by kevin11

Ok I had a feeling I had that second one wrong. So would the middle part always be included in every domain?

The domain is all real numbers except for values of x such that x^2 - x - 12 = 0. You should think about why.