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OpenStudy (anonymous):
Which of the following sets is closed under multiplication? A. {0, 1} B. {1, 2} C. {0, 1, 2} D. None of the sets are closed under multiplication.
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OpenStudy (amistre64):
what does it mean to be closed under an operation?
OpenStudy (anonymous):
I don't know that's why I asked.
OpenStudy (anonymous):
A) was correct
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