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Maths-

General

Easy

Question

Which one of the following relations on $R$ is an equivalence relation?

$a R_{1} b \Leftrightarrow |a| = | b |$
$a R_{2} b \Leftrightarrow a \geq b$
$a R_{3} b \Leftrightarrow a d i v i d e s b$
$a R_{4} b \Leftrightarrow a < b$

The correct answer is: $a blank R subscript 4 end subscript b left right double arrow a less than b$

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