Need help with weird circuit design truth table (1 Viewer)

mlando

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they are missing half of the truth table. you would do the question as follows:

first suppose that Q=0, Q'=1. this tells you one of the inputs to each of the AND and NOR gates. now suppose A=0 and B=0. then we get that C=A AND Q=0, D=B AND Q'=0. now suppose that A=1,B=0 then do the same as above. repeat for A=0,B=1 and then for A=1,B=1.

then suppose that Q=1 and Q'=0 and repeat for each of the four possible combinations of values for A and B.
 

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