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OpenStudy (anonymous):
Discrete Math: f(x) = x/(1+x^2). Determine whether f is one-to-one, onto, or both, with domain & codomain = reals. Prove your answer.
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OpenStudy (anonymous):
To show whether it's one-to-one I know I have to work out a/(1+a^2) = b/(1+b^2) but I don't know how to simplify that to just a = b.
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