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...that the output is defined? foe each of the following, design a logic circuit which utilizes only NAND-gates so that the output is defined by the given boolean expression 1. x1+x2 2. x1x2 3. x1'

...that the output is defined? foe each of the following, design a logic circuit which utilizes only NAND-gates so that the output is defined by the given boolean expression 1. x1+x2 2. x1x2 3. x1'