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JEE Mains · Maths · STD 12 - 1. relation and function

संबंधों \(\mathrm{S}=\left\{(\mathrm{a}, \mathrm{b}): \mathrm{a}, \mathrm{b} \in \mathbb{R}-\{0\}, 2+\frac{\mathrm{a}}{\mathrm{b}}>0\right\}\) तथा \(\mathrm{T}=\left\{(\mathrm{a}, \mathrm{b}): \mathrm{a}, \mathrm{b} \in \mathbb{R}, \mathrm{a}^2-\mathrm{b}^2 \in \mathrm{Z}\right\}\), में

  1. A \(\mathrm{S}\) संक्रामक है परन्तु \(\mathrm{T}\) नही है
  2. B \(T\) सममित है परन्तु \(S\) नहीं है
  3. C न तो \(S\) न ही \(T\) संक्रामक है
  4. D \(S\) तथा \(T\) दोनों सममित है
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Correct Answer

(B) \(T\) सममित है परन्तु \(S\) नहीं है

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Detailed explanation

For relation \(T=a^2-b^2=-I\) Then,\((b, a)\) on relation \(R\) \(\Rightarrow b ^2- a ^2=- I\) \(\therefore T \text { is symmetric }\) \(S =\left\{( a , b ): a , b \in R -\{0\}, 2+\frac{ a }{ b } > 0\right\}\)…
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