First slide

Logic gates

Question

The diagram shows a logic network
If the inputs L, M and N are all at logic 1, what are the logic states of P, Q and R

Moderate

A

0, 0 and 0
B

0, 0 and 1
C

0, 1 and 0
D

1, 1 and 1

Solution

L M N $P = \bar{L . M}$ $R = \bar{M + N}$ $Q = \bar{P . R}$
1 1 1 0 0 1

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