Question

What is the domain and range of 200/x + 2?

Answer 1

Before you attempt a problem of this kind, it always helps to sketch the function. This is what we have for
f(x)=200/x+2
link to image follows:
http://i263.photobucket.com/albums/ii157/mathmate/function.png

Domain:
{x|x<0}U{x|x>0}
i.e. R with exclusion of 0 which makes the function infinite.
Range:
{x|R}
where R stands for all real numbers.

See more examples and explanations at:
http://www.purplemath.com/modules/fcns2.htm