Decide, for each of the following sets, whether it is convex or nonconvex. (a) C = R\Q, where Q denotes the set of all rational numbers (i.e., C is the set of all irrational numbers). {x € R? : max{|x1|, |x2|} < 1}. {x € R? : min{|x1|, |#2|} < 1}. {x € R? : a} > x3}. (b) С — (c) C (d) с

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