Let R be the relation on the set of people with doctorates such that (a, b) ER if and only if a was the thesis advisor of b. When is an ordered pair (a, b) in R²? When is an ordered pair (a, b) in R", when n is a positive integer? (Assume that every person with a doctorate has a thesis advisor.)

Q: Let R be the relation on the set of integers, s.t., aRb if and only if a=b or a= -b. Is R an…

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Q: y) ∈ R mean

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A: Here given set Z=1, 2, 3, ....., 50

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A: As per the condition, in every order pair there should be only 1 letter in common.