Prove that the relation `R={(x,y): x, y in N and x-y \" is divisible by 7 \"}` defined on
Channel: Doubtnut
Date: 2019-12-29

Prove that the relation `R={(x,y): x, y in N and x-y \" is divisible by 7 \"}` defined on positive integers N is an equivlance relations.