Asked by Kate

What is the domain of f/g, given f(x)= x+2 and g(x)= x-7?

I was told this below,
all real numbers EXCEPT 7

But
My choices are this,
(-infinity,7) U (7,infinity)
(-infinity,-7) U (-7,infinity)
(-infinity,-2) U (-2,7)U (7,infinity)
(-infinity,infinity)
Answered by Steve
well, yeah.
(-∞,∞) is all real numbers.

So, how do you get x=7 out of there? You divide it up into two intervals, each excluding x=7

So, whaddaya think?
Answered by Scott
there is something about the shape of the parentheses/brackets that excludes one end of an interval

sorry...rusty on this part
Answered by Kate
Is it A then steve??
Answered by Steve
that is correct. The () interval notation indicates that the endpoints are not included.
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