Question: Exercise 1 (10 point). Let x, y be any non-zero rational numbers such that xy + -1. Prove that 14 is also a rational number

Exercise 1 (10 point). Let x, y be any non-zero rational

Exercise 1 (10 point). Let x, y be any non-zero rational numbers such that xy + -1. Prove that 14 is also a rational number by direct proof. y

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