Hi MHF.

When giving an answer for a domain, say for:

Do I say:

R | x \geq 0" alt="D(f)=R | x \geq 0" />

Well...Tex codes aren't cooperating..I'll try and write it:

D(f)=R|x is greater than or equal to 0

Or do I write:

D(f)=x is a part of R | x is greater than or equal to 0

Which method is correct?

Also, when I have multiple values where x is not defined, but these values do not lie on a range such as the case for:

How do I answer for -1 and 1? Do I write:

D(f)=R|x is not equal to -1, x is not equal to 1 ?

Thanks!