Question

Prove that the sum of all minterms of a Boolean function of n variable is one

Answer 1

 I used ' for not and variables a, b, c 
S = abc+ abc'+ ab'c+ ab'c'+ a'bc+ a'bc'+ a'b'c+ a'b'c' = 
ab(c+c') + ab'(c+c')+ a'b(c+c')+ a'b'(c+c')= 
ab+ab'+ a'b+a'b'= 
a(b+b')+ a'(b+b')= 
a+ a' = 1 
We know that x+ x' =1

src: brainly