Question: nonempty subsets 5. Let A, B be nonempty subsets of R each bounded from above. Prove or diSprove. (a) sup(A U B) = sup{sup A,

nonempty subsets

5. Let A, B be nonempty subsets of R each bounded from above. Prove or diSprove. (a) sup(A U B) = sup{sup A, sup B}. (b) sup(A n B) = inf{sup A, sup B}

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