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Mathematics 13 Online
OpenStudy (anonymous):

assume that you have a function from set A to set B. If u know that the functions are simultaneusly one to one(injective) and onto (surjective) what can you say about the number of elements in set A and set B

OpenStudy (helder_edwin):

u have one function \(f:A\to B\) that is both injective and surjective, right?

OpenStudy (anonymous):

yes

OpenStudy (helder_edwin):

then both sets have the same number of elements

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