Let `Q^(+)`be the  set of all   positive rationals  then  the  operation  * on `Q^(+)` defined
Channel: Doubtnut
Date: 2020-04-12

Let `Q^(+)`be the  set of all   positive rationals  then  the  operation  * on `Q^(+)` defined  by a*b `=(ab)/(2)` for all `a, b in Q^(+)` is