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Question
If R is a relation on the set A = {1, 2, 3, 4, 5, 6, 7, 8, 9} given by x R y ⇔ y = 3 x, then R = _____________ .
Options
{(3, 1), (6, 2), (8, 2), (9, 3)}
{(3, 1), (6, 2), (9, 3)}
{(3, 1), (2, 6), (3, 9)}
none of these
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Solution
none of these
The relation R is defined as
R = {(x, y) : x, y ∈ A : y = 3x}
⇒ R = {(1, 3), (2, 6), (3, 9)}
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