First time here? Checkout the FAQ!
0 votes

asked in Mathematical Logic by Boss (8.6k points)   | 69 views
IS A false ?
No,it is equivalence relation.
they say C is correct
even i also attempt the question in test series.

i dont know much about C but A should be correct.
Well, I found a lot of good questions in this test:)
Its an equivalence relation i.e. option A
@sushant plz check???

aRb <-----> (a divide b) or (b divide a)

 its not reflexive so option A , B,  D is incorrect because equivalence have also reflexive and partial order also have reflexive and  Toset have also poset.

 option C is correct
@Hradesh Why not reflexive? a divides a is always true.
@air1  i think that here (a divide b) or (b divide a)  but its not say a divide a ?? if i am wrong plz check?? and point it
@Hradesh The question means that for any two elements $a$ and $b$ from set A, $a R b$ (element a is related to b) if $a$ divides $b$ or $b$ divides $a$. Now consider any element of set A, call it $p$. $p$ divides $p$, so $p R p$ so relation R is reflexive.

Please log in or register to answer this question.

Top Users Feb 2017
  1. Arjun

    4694 Points

  2. Bikram

    4004 Points

  3. Habibkhan

    3738 Points

  4. Aboveallplayer

    2966 Points

  5. sriv_shubham

    2278 Points

  6. Smriti012

    2212 Points

  7. Arnabi

    1814 Points

  8. Debashish Deka

    1788 Points

  9. sh!va

    1444 Points

  10. mcjoshi

    1444 Points

Monthly Topper: Rs. 500 gift card

20,788 questions
25,938 answers
21,929 users