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Question 827244: write the domain of each rational expression in set notation for
1-x^2/x and 2b-2/2b^2-8. Explain if they have excluded values, or why they don't.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! write the domain of each rational expression in set notation for
1-x^2/x and 2b-2/2b^2-8. Explain if they have excluded values, or why they don't.
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(1-x^2)/x
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= (1/x) - x
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Domain: All Real Numbers except x = 0
(-oo,0)U(0,+oo)
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(2b-2)/(2b^2-8)
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= (b-1)/[(b-2)(b+2)]
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Domain: All Real Numbers except b = 2 or b = -2
(-oo,-2)U(-2,2)U(2,+oo)
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Cheers,
Stan H.
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