Question 746219
The function g  is defined below. 
g(x)=(x-8)/(x^2-1)
Find all values of x that are NOT in the domain of g.
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{{{g(x)=(x-8)/(x^2-1)}}}, factor the denominator
{{{g(x)=(x-8)/(x+1)(x-1)}}}, looking at the denominator, the value of x are all numbers except +1 and -1.
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Proof: The the curve doesn't touch the line x=1 and x=-1
{{{graph(800,600,-10,10,-15,20,(x-8)/(x^2-1))}}}