3. Let P, Q and R be sets, PCR, QC R. Are the following expressions true...

  

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3. Let P, Q and R be sets, PCR, QC R. Are the following expressions true or false? Explain why. (a) P (PUQ) - P (b) PUQ (P-Q) UQ (c) (PUQ) PC UQc (d) POR=P 4. Let P, Q and R be the sets P={n ne N, 2 n 10} Q={nne N, 5 < n 20 } R={n ne N, 1 n < 10 } Find: (a) Pn (QUR) (b) Qn (P-R) 3. Let P, Q and R be sets, PCR, QC R. Are the following expressions true or false? Explain why. (a) P (PUQ) - P (b) PUQ (P-Q) UQ (c) (PUQ) PC UQc (d) POR=P 4. Let P, Q and R be the sets P={n ne N, 2 n 10} Q={nne N, 5 < n 20 } R={n ne N, 1 n < 10 } Find: (a) Pn (QUR) (b) Qn (P-R)