Four NOR gates are connected as shown in figure

Question:

Four NOR gates are connected as shown in figure.

The truth table for the given figure is :

 


Correct Option: , 4

Solution:

$y=\overline{(\overline{A+\overline{A+B}})+(\overline{B+\overline{A+B})}}$

$\mathrm{y}=(\mathrm{A}+\overline{\mathrm{A}+\mathrm{B}}) \cdot(\mathrm{B}+\overline{\mathrm{A}+\mathrm{B}})$

Ans. 4

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