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यदि `A ={1, 3, 5, 6, 7}, B ={2, 3, 6, 8}` और `C ={1, 2, 3, 4}`, तो ज्ञात कीजिए : `B -A`

Answer» `B-A={x : x in B` और `x notin A}={2, 8}`.


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