Question

Let  $$X=A\overline{BC}+B\overline{CA}+C\overline{AB}.$$   Evaluate X for  A = B = C = 1. 

Answer 1

Given:
Output  

$$X=A\overline{BC}+B\overline{CA}+C\overline{AB}.$$  

A = B = C = 1

$$X=1.(\overline{1.1)}+1.(\overline{1.1)}+1.(\overline{1.1)}$$ 

$$=1.\overline{1}+1.\overline{1}+1.\overline{1}$$ 

$$=1.0+1.0+1.0$$ 

$$=0+0+0$$ 

$$=0$$