Question: Help soving ONLY part (1).... Using theorem 1.5.5 and 1.5.6 prove (1) Exercise 1.5.3. [Used in Theorem 1.5.5 and Theorem 15.6.] Letre Z and y

Help soving ONLY part (1).... Using theorem 1.5.5 and 1.5.6 prove (1)

Exercise 1.5.3. [Used in Theorem 1.5.5 and Theorem 15.6.] Letre Z and y e Z". (1) Prove that (x, y)] = 0 if and only if r= 0. (2) Prove that (x, y)] = 1 if and only ifx = y. (3) Prove that 0 sholds (Trichotomy Law). II. Ifr 0, then ri

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