Q1:7 check wheth er he fllowing Systems foras Gystoms forms a group (a bemi -gronup) or...

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Q1:7 check wheth er he fllowing Systems foras Gystoms forms a group (a bemi -gronup) or not. (a): G * e*, no's under' * where こ Set of Yational under the blo no-B defined by (b): Q = Set a *b = ab , a,be G 2 of Yatlonal a *b a +b- ab (C) : All subsets of X with the operation A *B = AUB. %3D Q1:7 check wheth er he fllowing Systems foras Gystoms forms a group (a bemi -gronup) or not. (a): G * e*, no's under' * where こ Set of Yational under the blo no-B defined by (b): Q = Set a *b = ab , a,be G 2 of Yatlonal a *b a +b- ab (C) : All subsets of X with the operation A *B = AUB. %3D