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Exercise 2.8 (Solutions)

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e 2.8: Textbook of Algebra and Trigonometry Class XI (Mathematics FSc Part 1 or HSSC-I), Punjab Textbo... questions: (i) Name the identity element if it exists? (ii) What is the inverse of 1? (iii) Is th... t{3}b \in G$ where $a$ & $b$ are rational, there exit rationals $– a$ & $-b$ such that \begin{align} ... inverse of $a+\sqrt{3}b$ is $(-a)+\sqrt{3}(-b)$, exists in $G$. (v) For $a+\sqrt{3}b$, $c+\sqrt{3}d \