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  3. prove that for any bijection f a b...

Question: prove that for any bijection f a b...

Question details

Prove that for any bijection f : A → B there exists another function g : B → A such

thatforanya∈A,(g◦f)(a)=a,andforanyb∈B,(f◦g)(b)=b. (Thisfunctiong

is called the inverse function of f and is also denoted f−1.)

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