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OpenStudy (anonymous):

what is the domain of x/x^2+1

OpenStudy (anonymous):

The domain is all real numbers x such that x ≥ 0 and the range is all real numbers. Incorrect. Negative values can be used for x, but the range is restricted because x2 ≥ 0. The correct answer is: The domain is all real numbers and the range is all real numbers f(x) such that f(x) ≥ 7.

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