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Questions  

The combination of NAND gates shown here under equivalent to - gate   

a
AND gate
b
OR gate
c
NOT gate
d
NAND gate

detailed solution

Correct option is B

the outpput x  after A and B is A. B  and  is equal to A+B  according to De Morgan's theorem final output y is equal to A+B=A+B

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In the  following  circuit,  the  output  for  all  possible inputs and is expressed by the truth table


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