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Illustrate part(a) on a Venn diagram. A and B are Dedekind cuts. Prove the following. (a) If ACB then AUB = B. (b) AnB

Illustrate part(a) on a Venn diagram. A and B are Dedekind cuts. Prove the following. (a) If ACB then AUB = B. (b) AnB is a Dedekind cut.

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