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Let X={1,2,3,..., 12}, A={4,5,9,11} , B=...

Let `X={1,2,3,..., 12}, A={4,5,9,11}` , `B={1,2,4,5,8,9,10, 11,12}` Verify that `B^prime` is a subset of `A^prime`.

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B^{prime)=X-B={1,2,3, ... .12-1,2,4,5,8,9,1 ...1,12}=3,6,7,10. .A^prime=X-A={1,2,3, ….., 12-4,5,9,11=1,2,3,6,7,8,10,12.} .therefore B^(prime0 sub A^(prime).
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