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Re: Calculus Query
A 1-1 function (also written as one-to-one) is one that only goes down or up, not both, over its entire length. I don't understand why Denman says you can only call a function if it's 1-1 in theory, but he may know more than I do, which is quite likely. However, y=x^2 is a function, and it's not 1-1.
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