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Question
Write the domain of the relation R defined on the set Z of integers as follows:-
(a, b) ∈ R ⇔ a2 + b2 = 25
Solution
Domain of R is the set of values satisfying the relation R.
As a should be an integer, we get the given values of a:-
0, ±3, ±4, ±5
Thus ,
Domain of R = {0, ±3, ±4, ±5}
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