In the set A = {1,2, 3, 4} is defined a relation R by ? = {(1,1), (1,3), (3, 4), (4, 3)}. ndicate all of the following pairs that belong to the symmetric closure of R. - (1,1) - (1, 2) - (1, 3) - (1, 4) - (2, 1) O (2, 2) о (2,3) O (2, 4) O (3, 1) - (3, 2) O (3, 3) O (3, 4) D (4, 1) D (4, 2)

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A: A=0,1,2,3,4 B=1,2,3,4,5 a2=b

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