Identify the logic gates marked `X, Y` in the given logic circuit Fig. Write down then output at y, when (i) `A=0,B=0` and (ii) `A=1, B=1`.
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Here the logic gate marked as X is NAND gate and marked as Y is NOT gate. The Boolean expression for this combination of gate is `y=bar(y^('))=bar(bar((A.B)))=A.B` Therefore, the output at y , will be as given in Fig.
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