Q.

The canonical sum of product form of the function y(A,B) = A + B is                      

A. ab + bb + a’a
B. ab + ab’ + a’b
C. ba + ba’ + a’b’
D. ab’ + a’b + a’b’
Answer» B. ab + ab’ + a’b
Explanation: a + b = a.1 + b.1 = a(b + b’) + b(a + a’) = ab + ab’ + ba +ba’ = ab + ab’ + a’b = ab
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