Question

Let A = {1,2,3,7} and B = {3,0,-1,7}. Which of the following are relation from A to B ?
1. R1 = { [2,1] , [7,1] }
2. R2 = { [2,-1] , [7,7] , [1,3] }
3. R3 = { [7,1] , [0,3] , [3,3] , [0,7] }

Answer 1

Answer:

1.R1 is not a relation

2.R2 is a relation

3.R3 is not a relation