Thread: 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)

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)

Range = y is all real numbers

really? can we touch, say, y = 0, for instance?

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

review the range

would the first one be something like

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

yes

and the second one is it: (-inf, inf)

were the second one correct, this would be it, alas, it isn't