- #1
bird34
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Homework Statement
List the ordered pairs in the relation R from A = {1, 2, 3, 5} to B = {2, 4, 6, 9} where <x, y> is an element of R iff:
(i) x ≥ y
(ii) x – y < 2
(iii) x – y > 2
(iv) l.c.m. (x, y) = 18
(v) g.c.d. (x, y) = 3
I understand in general ordered pairs and cartesian products, but I'm not sure where to begin when there are limitations such as these.