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10. Analyze the following reasoning: (a) Let S be a set of real numbers. If x is in S, then x2 is in S. But

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10. Analyze the following reasoning: (a) Let S be a set of real numbers. If x is in S, then x2 is in S. But x is not in S, hence x2 is not in S. (b) Let S be a set of real numbers. If x is in S, then x2 is in S. Therefore, if x2 is in S, then x is in S

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