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

माना \(S =\{1,2,3,4\}\) है। तब समुच्चय \{f: \(S \times S \rightarrow S : f\) आच्छादक तथा \(f ( a , b )= f ( b , a \geq a \forall( a , b ) \in S \times S \}\) में अवयवों की संख्या है

  1. A \(37\)
  2. B \(378\)
  3. C \(97\)
  4. D \(30\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(37\)

Step-by-step Solution

Detailed explanation

\((1,1),(1,4),(4,1),(2,4),(4,2),(3,4),(4,3)\), \((4,4)-\) all have one choice for image. \((2,1),(1,2),(2,2)\) - all have three choices for image \((3,2),(2,3),(3,1),(1,3),(3,3)-\) all have two choices for image. So the total functions…
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