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A mapping f : X → Y is one one if __________

Posted: Thu Jul 14, 2022 8:57 am
by answerhappygod
a) f(x1) ≠ f(x2) for all x1, x2 in X
b) If f(x1) = f(x2) then x1 = x2 for all x1, x2 in X
c) f(x1) = f(x2) for all x1, x2 in X
d) None of the mentioned