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  3. 3 let i denote the open interval 2 0o of...

Question: 3 let i denote the open interval 2 0o of...

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3. Let I denote the open interval (2, 0o) of the real line. For a real positive number t, define the indexed set At as follows: Find Ur At and TI At. Justify your conclusions. Hint: For example, the set of points (x,y) of the plane satisfying x2 + y2 〈 4 consists of the interior of a circle with center at the origin, and radius 2. Find a similar interpretation, say, for the set of points satisfying x2 +y2 〉

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