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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Kanika goswami 1
obviously R* is internal direct product of R+ and subgroup {1,-1}....because when positive elements of R+ multiply with -1 then we will get negative real numbers....and when elements of R+ multiply with 1 then we will get positive real numbers.....i.e., we get whole R*......ok.