Question: Let ( G 1 , * * ) be a group. Suppose that G 2 s u b e G 1 such that G 2

Let (G1,**) be a group. Suppose that G2subeG1 such that G2 is non- empty. Let a,binG2, if ab-1inG2 then prove G2 is a group under the same operation **.
Let (G1,**) be a group. Suppose that G2subeG1 such that G2

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