Hi Bridget;
C(x)= 1/x^24
I believe this is...
C(x)=1/(x^{2}4)
You probably already know that a numerator cannot equal zero.
So let's work with 0≠x^{2}4
Let's factor...
0≠(x2)(x+2)
Let's separate...
0≠x2 and 0≠x+2
x≠2 and 0≠2
The domain is all integers except 2 and 2.
(infinity,2)U(2,2)U(2, +infinity)
According to Michael F., the Wyant of Wilton, CT, "the parentheses ( and ) indicate no endpoints. The symbol ∪ means set union."
10/22/2013

Vivian L.
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