Mathematics · 2020
JEE Main · 2 September 2020, Shift 1 · Q51
If R ={(x, y): x, y ∈ Z, x^2+3 y^2 ≤ 8} is a relation on the set of integers Z, then the domain of R^-1 is:
If $\displaystyle \mathrm{R}=\left\{(x, y): x, y \in \mathbb{Z}, x^2+3 y^2 \leq 8\right\}$ is a relation on the set of integers $\displaystyle \mathbf{Z}$, then the domain of $\displaystyle \mathrm{R}^{-1}$ is :
Official answer
(3)
$\displaystyle \{-1,0,1\}$
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JEE Main 2020 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.