Question: let A and B be nonempty set and let f:A->B be a function consider the following statement 1.) f(S)f(T)=f(ST) for any subset anf T of

let A and B be nonempty set and let f:A->B be a function

consider the following statement

1.) f(S)\f(T)=f(S\T) for any subset anf T of A

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