0 votes 0 votes Mathematical Logic made-easy-test-series set-theory&algebra relations + – Shankar Kakde asked Jan 10, 2019 • edited Mar 3, 2019 by Rishi yadav Shankar Kakde 458 views answer comment Share Follow See all 2 Comments See all 2 2 Comments reply kumar.dilip commented Jan 10, 2019 reply Follow Share $B$ ?? 0 votes 0 votes Kunal Kadian commented Jan 10, 2019 reply Follow Share Answer is B. R is equivalence. S is not equivalence because it is not reflexive. It does not contains (a,a), because a line can't be perpendicular to itself. 2 votes 2 votes Please log in or register to add a comment.
1 votes 1 votes R is reflexive , symmetric and transitive ,so equivalence relation. S is only symmetric, so not equivalence relation. ayush.5 answered Oct 12, 2020 ayush.5 comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes 1 is equivalence relation and 2nd is not equivalence relation. arun yadav answered Oct 12, 2020 arun yadav comment Share Follow See all 0 reply Please log in or register to add a comment.