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Prove that f:X rarr Y is injective iff ...

Prove that `f:X rarr Y` is injective iff for all `subsets A,B of X,f(A nn B ) = f(A) nn f(B)`.

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MODERN PUBLICATION-TEST PAPER 9-EXERCISE
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  12. Obtain the co-ordinates of the foot of the perpendicular drawn from th...

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  13. Let A=Rxx R and be the binary operation on A defined by (a, b) *(c,d) ...

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  14. Prove that f:X rarr Y is injective iff for all subsets A,B of X,f(A n...

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  15. Use matrix product [(1,-1,2),(0,2,-3),(3,-2,4)] [(-2,0,1),(9,2,-3),(6,...

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