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Question

Let A = {1, 2, 3, 4} and B = {a, b, c}. State, which of the given are relations from A to B.
{ (1, 2), (1, 3), (2, 3), (2, 4), (3, 4), (3, 1) }.

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Solution

For a set of ordered pairs to be a relation from A to B, then the x-coordinates of the ordered pairs should be from A and the y-cordinates should be from B.
Now, in the given set of ordered pairs, the y-coordinates are not from the set B. Hence, the given set of ordered pairs are not a relation from A to B.

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