1.

यदि `A ={3, 5, 7, 9, 11}, B ={7, 9, 11, 13}, C ={11, 13, 15}` और `D ={15, 17}` तो निम्नलिखित ज्ञात कीजिए। `(A nn B) nn (B uu C)`

Answer» `A n B={x : x in A` और ` x in B}`
`={7, 9, 11}`
`B uu C ={x : x in B` या `x in C}`
`={7, 9, 11, 13, 15}`
अब, `(A nn B) nn (B uu C)={x : x in (A nn B)` और `x in (B uu C)}`
`={7, 9, 11}`


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