F and H are sets of real numbers defined as follows. F={y|y21} H= {y |y>7} Write FUH and FnHusing interval notation. If the set is empty, write Ø. (0,0) [0,0) (0,0) FUH = [0,0) DUO FnH =0 00 -00 8.

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Set Theory

Every field in the present world involves a set. The theory of sets was developed by German mathematician Georg Cantor while working on the “problems of trigonometric series”.