# Write Domain and Range in Interval Notation

• Oct 14th 2008, 05:28 PM
NeedHelp18
Write Domain and Range in Interval Notation
f(x) = x - 2/ (x^2 - 4)

This is what I got:

D = x is not 2, -2, x is all real numbers
Range = y is all real numbers

Are these answers right, and if so how do i write it in notation?

would the first one be something like

(-inf, -2) U (-2,2) U (-2, inf)

and the second one is it: (-inf, inf)
• Oct 14th 2008, 06:29 PM
Jhevon
Quote:

Originally Posted by NeedHelp18
f(x) = x - 2/ (x^2 - 4)

This is what I got:

D = x is not 2, -2, x is all real numbers

nice (but it won't be all real numbers if x cannot be 2 or -2)

Quote:

Range = y is all real numbers
really? can we touch, say, y = 0, for instance?

Quote:

Are these answers right, and if so how do i write it in notation?
review the range

Quote:

would the first one be something like

(-inf, -2) U (-2,2) U (-2, inf)
yes

Quote:

and the second one is it: (-inf, inf)
were the second one correct, this would be it, alas, it isn't