(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[tex]y= \frac{x + \frac{1}{x}+1}{x+\frac{1}{x}+2}[/tex]

That is equal to [tex]y = \frac{x^2+x+1}{(x+1)^2}[/tex]

Whenever I graph either one of those they are the same graph (as well they should be) and they have a value for x=0. But why should x = 0 be in the domain? And also if you go by the second equation then x = 0 appears that it should be in the domain even though it shouldn't?

If it shouldn't be in the domain, then whenever you see an equation for a graph, how do you know whether or not it stemmed from another equation where 0 shouldn't be in the domain?

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# Homework Help: Graph Question

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