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Let A and B be sets. Show that f : A x...

Let A and B be sets.
Show that f : `A xx B rarr B xx A ` such that f (a,b) = (b,a) is bijective function .

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MODERN PUBLICATION-RELATION AND FUNCTIONS-EXERCISE
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  7. Prove that f:X rarr Y is surjective iff for all B sube Y, f(f^(-1)(B))...

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  13. Find the number of equivalence, relations on X ={1,2,3),

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  17. Prove that f:X to Y is injective iff for all subsets A, B of X, f (A c...

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  19. Let R be the relation on the set R of real numbers such that aRb iff a...

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