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Question

If P={x | 24<x<30} and Q={x | 25<x<32}, prove that PQQP

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Solution

We have
P={x|24<x<30|}Q={x|25<x<32|}PQmeansthoseelementthatareinsetPnotinsetQ.and,QPmeansthoseelementthatareinsetQnotinsetp.Ifwetake25,25isinsetPnotinsetQHence,PQQP.

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