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Mathematics

Reflexive relation

In Class 12 Mathematics, under Relations and Functions, students study a reflexive relation as a relation R on a set A in which every element is related to itself: (a, a) ∈ R for every a ∈ A. They learn to verify this condition from ordered pairs, tables, matrices, and arrow diagrams, and to identify examples and non-examples. The topic also helps students distinguish reflexivity from other relation properties such as symmetry and transitivity.

Medium · Level 7 · 4 questions

TOPIC PRACTICE

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4 questions

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  1. For every (a\in A), ((a,a)\in R)
  2. For every (a,b\in A), ((a,b)\notin R)
  3. If ((a,b)\in R), then ((b,a)\in R)
  4. If ((a,b)\in R), then ((b,c)\in R)
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  1. ((3,3)) is also necessary
  2. ((1,2)) is also necessary
  3. ((2,1)) is also necessary
  4. ((1,3)) is also necessary
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  1. 4
  2. 7
  3. 5
  4. 3
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  1. 5
  2. 4
  3. 20
  4. 14

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