1. For each n € N, let An = {r €Z:22
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1. For each n € N, let An = {r €Z:22
1. For each n € N, let An = {r €Z:22 <n}. (a) Find the max, min, sup and inf of A1, if any. (b) Find An A2, A1 - A2 and A3 A4. (c) Find û An and ñ And (2+3+2=7 marks) n=1 n=1
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