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[" Aumber of elements that "A uu B" and ...

[" Aumber of elements that "A uu B" and "6" elements respectively.What and "],[" number of elements that "A uu B" can have."],[" If "A={x in C:x^(2)=1}" and "B={x in C:x^(4)=1}," then write "A-B" and "B-A" ."],[" If "A={x in C:x^(2)=1}" and "B={x in C:x^(4)=1}," then write "A-B" and "B-A" ."]

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