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OpenStudy (anonymous):
set(0,1,-1) is closed under what operation?
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OpenStudy (perl):
multiplication
OpenStudy (amistre64):
well its a good thing that the asker has a fair grasp of what a set is now, and what an operation does, and also what the term closed refers to. After all, such a simple question must suggest that all they are doing is giving you a test to see how smart you really are :/
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