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Sticky Note
A = {a, b, c} and B = {x, y, z}, then the function f(a) = y, f(c) = x defines a?
  1. Not a function
  2. One-one and onto function
  3. One-to-one function
  4. None of these
Explanation
  • A function must assign each element of A a unique value in B, but f(b) is not defined, so it fails to be a function.
  • Since not all elements of A have an image in B, it does not satisfy the definition of a function.

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