1.

Which of the following Boolean equation is/are incorrect? Write the correct forms of the incorrect ones :(a)  A + A’ =1(b)  A + 0 = A(c) A . 1 = A(d)  AA’=1(e)  A+ AB = A (f) A(A+B)’ = A (g)  (A+B)’ = A’ + B (h)  (AB)’=A’B’(i)  A + 1 =1(j)  A + A =A (k)  A + A’B = A +B(l)  X +YZ = (X + Y)(X + A)

Answer»

(a) Correct

(b) Correct

(c) Correct

(d) Incorrect. Correct form is A . A’ = 0

(e) Correct

(f) Correct

(g) Incorrect. Correct form is (A + B)’ = A’B’

(h) Incorrect. Correct form is (AB), = A’ + B

(i) Correct

(j) Correct

(k) Correct

(l) Incorrect. Correct form is X + YZ = (X + Y)(X + Z)



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