If R = {(x, y) : x, y $ \in $ Z, x2 + 3y2 $ \le $ 8} is a relation on the set of integers Z, then the domain of R–1 is :

Question

If R = {(x, y) : x, y $ \in $ Z, x² + 3y² $ \le $ 8} is a relation on the set of integers Z, then the domain of R^–1 is :

{0, 1}

{–2, –1, 1, 2}

{–1, 0, 1}

{–2, –1, 0, 1, 2}

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