Question: prove ab -1 E H Let G be 2. group. and Ha on-empty subset of G. then it is extup sub-group iff a, b e

Let G be 2. group. and Ha on-empty subset of G. then

prove ab-1 E H


Let G be 2. group. and Ha on-empty subset of G. then it is extup sub-group iff a, b e H ab & H

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