12. Which of the following is submonoid of (Q, *) where a*b = ab? A. (Z, *) C. ({0}, *) B. (R+, *) D. (Q-, *) 12
12. Which of the following is submonoid of (Q, *) where a*b = ab? A. (Z, *) C. ({0}, *) B. (R+, *) D. (Q-, *) 12
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Transcribed Image Text:12. Which of the following is submonoid of (Q, *) where a*b = ab?
A. (Z, *) C. ({0}, *)
B. (R+, *)
D. (Q-, *)
12
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