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`a R b` if `|a|lt=b` is defined on the set of real numbers, find whether it is reflexive, symmetric or transitive.

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Consider` aRb `if `|a| \leq b`. Let us check for this relation whether it is reflexive, transitive and symmetric.
Reflexivity:
Let a be an arbitrary element of `R`.
Then, `a \in R[` Since, `|a|=a] \Rightarrow|a| Clearly, `R` is not reflexive.
Symmetry:
Let `(a, b) \in R \Rightarrow|a| \leq b \Rightarrow|b| \leq a` for all `a, b \in R`
...
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