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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.

Expert · Level 4 · 25 questions

TOPIC PRACTICE

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25 questions

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  1. (\binom{12}{3})
  2. (\binom{16}{7})
  3. (2^7)
  4. (\binom{7}{4})
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  1. (\binom{20}{6})
  2. (\binom{25}{6})
  3. (2^{20})
  4. (\binom{6}{5})
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  1. (\binom{n^2-n}{2})
  2. (2^{n^2-n})
  3. (\binom{n^2}{n+2})
  4. (n^2-n)
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  1. (63)
  2. (64)
  3. (511)
  4. (512)
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  1. (2^{12}-1)
  2. (2^{16}-1)
  3. (2^{12})
  4. (12)
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  1. (2^{10})
  2. (2^{11})
  3. (2^{12})
  4. (2^8)
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  1. (63)
  2. (64)
  3. (6)
  4. (2^9)
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  1. (\binom{12}{5})
  2. (\binom{16}{9})
  3. (\binom{9}{4})
  4. (2^9)
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  1. 1
  2. 5
  3. 10
  4. (2^5)
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  1. 12
  2. 14
  3. 15
  4. 16
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  1. 3
  2. 6
  3. 8
  4. 9
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  1. 6
  2. 7
  3. 8
  4. 3
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  1. Yes
  2. No
  3. Only for (S)
  4. Only for empty set
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  1. It is reflexive
  2. It is not reflexive
  3. Only for empty set
  4. It is universal
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  1. Reflexive
  2. Not reflexive
  3. Empty
  4. Only proper subset relation
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  1. 1
  2. 2
  3. 3
  4. 4
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  1. Yes
  2. No
  3. Yes only for (2,3,4,5)
  4. Yes only for (1)
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  1. Reflexive
  2. Not reflexive
  3. Only for (16)
  4. Empty
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  1. Yes
  2. No
  3. Only for (1)
  4. Only for (8)
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  1. 2
  2. 3
  3. 4
  4. 5
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  1. 0
  2. 1
  3. 2
  4. 4
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  1. It is reflexive
  2. It is not reflexive
  3. Only for (0)
  4. It is universal
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  1. 1
  2. 2
  3. 3
  4. 5
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  1. 2
  2. 3
  3. 4
  4. 5
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  1. For every (a), (a-a=0) and (0) is divisible by (6)
  2. Because every (a) is divisible by (6)
  3. Because (A) contains (6)
  4. Because all pairs are different

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