efine the binary operator  ∇∇  by:     a∇b=9a∇b=9  Find each of the following:  3∇5=3∇5=    8∇8=8∇8=   5∇3=5∇3=    v∇n=v∇n=

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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”.