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Exercise 2.8 (Solutions)

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s: (i) Name the identity element if it exists? (ii) What is the inverse of 1? (iii) Is the set $G$... $. This show that $0$ is the identity element. (ii) Since $1+1=0$ (identity element) so the inverse ... table is a member of $G$ thus closure law holds. ii) $\oplus$ is associative in $G$. iii) Table show... t a group w.r.t to “$\times $”. **Question # 3 (ii)** Determine whether or not the set of rational n