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Let U={ 1, 2, 3, 4,5,6, 7, 8,9}, A ={1,3,5,6,8} and B={2,4,5,6,8,9}
 Oct 7, 2021
 #1
avatar+114828 
+1

There is no question.

 Oct 7, 2021
 #2
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0

how?

 Oct 7, 2021

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