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यदि A={1,2,3,4,5} और B={4,5,6,7,8} तो इन...

यदि `A={1,2,3,4,5}` और `B={4,5,6,7,8}` तो इन समुच्चयों के लिए सूत्र
`n(AuuB)=n(A)+n(B)-n(AnnB)`
को सत्यापित कीजिए।

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