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  • Solve it, If set A={a,b,c,d} and set B={1,2,3}. Then which of the following is not a relation from A to B?

If set A={a,b,c,d} and set B={1,2,3}. Then which of the following is not a relation from A to B?

  • Option 1)

    {(a,1);(a,2);(d,3)}

  • Option 2)

    {((a,2);(c,2)}

  • Option 3)

    {(a,1);(b,2);(c,4)}

  • Option 4)

    {(a,1);(b,2)}

 

Answers (1)

best_answer

As we learnt

 

RELATIONS -

 

A relation R in a set A is subset of  A× A.

If A and B be any two sets, then a relation R from A to B is a subset of AXB.

-

 

 Since (c,4) is not an ordered pair from A->B. It will not be an ordered pair of the relation.

 


Option 1)

{(a,1);(a,2);(d,3)}

Option 2)

{((a,2);(c,2)}

Option 3)

{(a,1);(b,2);(c,4)}

Option 4)

{(a,1);(b,2)}

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Himanshu

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