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f={(2, 1), (3, b), (4, b), (5, c)} is a....

`f={(2, 1), (3, b), (4, b), (5, c)}` is a____.

A

identity function

B

one-one function

C

many-one function

D

constant function

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • Let X = { 1,2,3,4}, Y = {a,b,c,d} and f={(1,a), (4,b), (2,c),(3,d),(2,d)}. Then f is

    A
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    B
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    an one to one function
    B
    an onto function
    C
    a function which is not one to one
    D
    not a function

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