For x,y∈R, define a relation R by x R yif and only if x−y+2 is an irrational number. Then R is
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a
reflexive
b
symmetric
c
transitive
d
none of these
answer is A.
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Detailed Solution
Since x−x+2=2 which is an irrational number so xRx for all x∈R. Hence R is reflexive. R isnot symmetric as (2,1)∈R but (1,2)∉R Again Ris not transitive since (2,1)∈R and (1,22)∈R but (2,22)∉R.