Hi, does anybody know how to prove the following statement: For each real number r, -|r|£ r £ |r|. by using two cases in the proof.
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Originally Posted by fruitcakelover Hi, does anybody know how to prove the following statement: For each real number r, -|r|£ r £ |r|. by using two cases in the proof. Given we define . Case 1, when . Thus . And so we need to prove . Which is true since and . Case 2, when . You continue.
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