Question: Exercise 1.3.5. As in Example 1.3.7, let A Q R be nonempty and bounded above, and let 0 e R. This time dene the set

Exercise 1.3.5. As in Example 1.3.7, let A Q R be nonempty and bounded above, and let 0 e R. This time dene the set CA = {ca : a E A}. (a) If c 2 0, show that sup(cA) = csup A. (b) Postulate a similar type of statement for sup(cA) for the case a 0, there exists an element a E A satisfying s - E

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