Let A = {x ∈ R : –1 ≤ x ≤ 1}, B = {y ∈ R : –1 ≤ y ≤ 1} and S be the subset of A × B, defined by S = {(x, y) ∈ A × B : x² + y² = 1}. Which one of the following is correct ?

Mathematics 2018 NDA Mathematics 2018 NDA 2018

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