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Question:

In the combination of the following gates the output Y can be written in terms of inputs A and B as: A⋅B + A⋅B

A⋅B

A⋅¬B + ¬A⋅B

A⋅B + A⋅B

A+B

Solution:

The correct option is A⋅¬B + ¬A⋅B
Output of AND gates are A⋅¬B and ¬A⋅B. Hence output of NOR gate will be A⋅¬B + ¬A⋅B.