1.Relation and Function
medium

यदि $R=\left\{(x, y): x, y \in Z , x^{2}+3 y^{2} \leq 8\right\}$ पूर्णांक $Z$ के समुच्चय का संबंध है तो $R^{-1}$ का प्रक्षेत्र है

A

$\{-2,-1,1,2\}$

B

$\{-1,0,1\}$

C

$\{-2,-1,0,1,2\}$

D

$\{0,1\}$

(JEE MAIN-2020)

Solution

$R=\left\{(x, y): x, y \in z, x^{2}+3 y^{2} \leq 8\right\}$

For domain of $\mathrm{R}^{-1}$

Collection of all integral of y's

For $x=0, \quad 3 y^{2} \leq 8$

$\Rightarrow \mathrm{y} \in\{-1,0,1\}$

Standard 12
Mathematics

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