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Prerna chaudhary 1 Asked a Question
October 15, 2021 11:51 pmpts 30 pts
Determine all subgroups of R* (nonzero reals under multiplica tion) of index 2. D
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  • Navdeep goyal 1
    understood
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  • Navdeep goyal 1 Best Answer
    H=R^+(set of all positive nonzero real numbers) is the only proper subgroup of R^∗ of finite index 2. bcz H.1 and H.(-1) are two different right cost of H in R* Union of these two ...
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