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Exercise 2.8 (Solutions)
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)** Determine whether or not the set of rational number form groups with respect to $\times$. **Solutio... n set $\mathbb{Q}$. Therefore the set of rational number is not a group w.r.t to “$\times $”. **Question... i)** Determine whether or not the set of rational number form groups with respect to $+$. **Solution** ... \mathbb{Q}$ under $+$ because sum of two rational number is also rational. b- Associative property holds