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

समुच्चय \(\{\mathrm{a}, \mathrm{b}, \mathrm{c}\}\) पर संबंध \(\mathrm{R}=\{(\mathrm{a}, \mathrm{b}),(\mathrm{b}, \mathrm{c})\}\) में कम से कम कितने अवयव जोड़े जाएं कि संबंध \(R\) सममित तथा संक्रामक हो जाए।

  1. A \(4\)
  2. B \(7\)
  3. C \(5\)
  4. D \(3\)
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Answer & Solution

Correct Answer

(B) \(7\)

Step-by-step Solution

Detailed explanation

For Symmetric \((a, b),(b, c) \in R\) \(\Rightarrow(b, a),(c, b) \in R\) For Transitive \((a, b),(b, c) \in R\) \(\Rightarrow(a, c) \in R\) Now \(1.\) Symmetric \(\therefore(a, c) \in R \Rightarrow(c, a) \in R\) \(2.\) Transitive \(\therefore(a, b),(b, a) \in R\)…
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