Question
Let R2 be the relation on Z+ such that rR2y if and only if 2x + y is a multiple of 3.
(Recall that Z+ ={1,2, 3, 4, ...}, the positive integers.)
(Recall that a number is a multiple of 3 iff it is equal to 3 times some integer.)
13) Prove or Disprove: R2 is symmetric.
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Let R2 be the relation on Z+ such that rR2y if and only if 2x + y is a multiple of 3. (Recall that Z+ ={1,2, 3, 4, ...}, the positive integers.) (Recall that a number is a multiple of 3 iff it is equal to 3 times some integer.) 13) Prove or Disprove: R2 is symmetric.

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