Solved: Use forward reasoning to show that if x is a
Chapter 1, Problem 1.7.20(choose chapter or problem)
Use forward reasoning to show that if x is a nonzero real number, then x2 + l /x2 :::: 2. [Hint: Start with the inequality (x - l /x)2 :::: 0 which holds for all nonzero real numbers x .]
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