Posted by mary on Monday, October 25, 2010 at 1:18pm.
domain of f : any real number
domain of g : any real number except x ≠ 0
fog
= f(g(x))
= f(3/x)
- (3/x)^2 - 3/x - 1
clearly the domain of fog is any real number, except x≠0
last line in calculation should say
= (3/x)^2 - 3/x - 1
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