Identify the gate and match A, B, Y in bracket to check.
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The given diagrams involve 2 gates. The first 1 is an AND gate followed by a NOT Gate, with the compliment of the output of first gate used as an input to the other gate which is NAND gate as NOT gate. We consider the 4 combinations A=1,B=1,AB=1,(AB)′=0,¯AB=1,Y=0 A=1,B=0,AB=0,(AB)′=1,¯AB=0,Y=1 A=1,B=0,AB=0,(AB)′=1,¯AB=0,Y=1 A=0,B=0,AB=0,(AB)′=1,¯AB=0,Y=1
The above configuration represents that of an AND gate.
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