Question: Let AsubeR ( R represents the real numbers ) and A non - empty. Prove TWO of the following: glbA lubA Let x , yinA.

Let AsubeR (R represents the real numbers) and A non-empty. Prove TWO of the following:
glbA lubA
Let x,yinA. Then |x-y||ubA-g|bA
glbA = lubA if and only if A contains only a single element
Let AsubeR (R represents the real numbers) and A non-empty. Prove

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