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Solution


Q.

R is a relation from {11, 12, 13} to {8, 10, 12} defined by y=x−3. Then R-1 is:
1 {(8, 11), (10, 13)}  
2 {(11, 8), (13, 10)}  
3 {(10, 13), (8, 11), (8, 10)}  
4 None of the above  

Ans.

(1)

Ans.    {(8,11), (10,13)}

Explanation:

Let               A={11,12,13},

                    B={8,10,12}

RB'A          y=x-3

                    R={(11,8),(13,10)}

               R-1={(8,11),(10,13)}