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Question

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

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

Posted under Discrete Mathematics

Answer: (b).If f(x1) = f(x2) then x1 = x2 for all x1, x2 in X

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

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