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OpenStudy (anonymous):
For which operations is the set {–1, 0, 1} closed?
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OpenStudy (anonymous):
@*shadow*
OpenStudy (anonymous):
@Lyrae
OpenStudy (anonymous):
@*shadow*
OpenStudy (lyrae):
If you use an operation (+, -, /, *) on two numbers in the set and the set is closed, the result is only allowed to be a number in the same set. Any clue which operations might do this?
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