# Discrete Functions: Real Numbers Not Equal to 0

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A function f(x) is defined on a set of real numbers x not equal to 0 as: f(x) = (2x +1)/x. Is f(x) one to one?

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#### Solution Preview

To show f(x) is one to one, we only need to prove that if f(x)=f(y), then x=y. In ...

#### Solution Summary

This shows how to determine if a function is one-to-one.

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