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

यदि `A={1,2,3,4},B={3,4,5,6}, C={5,6,7,8}` और `D={7,8,9,10}` तो निम्नलिखित ज्ञात कीजिए।
(i) `AuuB` (ii) `AuuC`
(iii) `BuuC` (iv) `BuuD`
(v) `AuuBuuC` (vi) `AuuBuuD`
(vii) `BuuCuuD`

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