Which of the following Boolean expression is not correct :-
(1) A . B = A + B                   (2) A + B = A . B                  (3) A . B = A . B             (4) 1 + 1 = 1

Dear Student ,
The fourth Boolean expression is not correct .As here we know that that complement of is 0 and the addition of two zeroes by the OR gate is also equal to zero .Thus here the fourth expression is wrong .
Regards

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