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P,Q and R represent switches in 'ON position' and $P^1,Q^1$ and $R^1$ represent switches in 'OFF position'.Construct a switching circuit representing the polynomial : $P(P+Q)Q(Q+R^1$)

Use Boolean Algebra to show that the above circuit is equivalent to a switching circuit in which when P and Q are in 'ON position',the light is on

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