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OpenStudy (anonymous):
Which of the following sets is closed under multiplication? {-1, 0, 1} {-2, 2, 4} {1, 2, 3}
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OpenStudy (anonymous):
The first set (-1,01) Closure means that multiplying the elements won't give you something not in the set
OpenStudy (anonymous):
-1,0,1. The other ones get out of range
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