Question 197801
Find the domain of the function. If the domain can be specified by only one interval, use (NONE, NONE) for the second interval. 
f(x)=x^4/(x^2+x-56) 
Factor where you can to get:
f(x) = x^4/[(x+8)(x-7)]
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Domain?
The denominator cannot be zero, so x cannot be -8 or 7
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Domain is (-inf,-8)U(-8,7)U(8,+inf)
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Cheers,
Stan H.