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OpenStudy (anonymous):
Help please MEDLE/FAN For which operations is the set {–1, 1} closed? Choose all answers that are correct. A. addition B. subtraction C. multiplication D. division
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OpenStudy (igreen):
I don't understand what it's asking.
OpenStudy (igreen):
The set {-1, 1}..what's that mean?
OpenStudy (anonymous):
idk thanks what i'm lost about to...
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