If A = 1, 2, 3, the relation R = (x, y) : y = x + 1, x, y in A is:

  1. (1, 2), (2, 3)
  2. (1, 2), (2, 3), (3, 4)
  3. (1, 1), (2, 2), (3, 3)
  4. (2, 1), (3, 2)
Answer

A) (1, 2), (2, 3)

Both x and y must be in A, so (3, 4) is not allowed. SLO M-09-A-15 · Knowledge

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