Question:
Let $\mathrm{X}=\overline{\mathrm{ABC}}+\mathrm{B} \overline{\mathrm{CA}}+\mathrm{C} \overline{\mathrm{AB}}$
Evaluate $X$ for
(a) $A=1, B=0, C=1$,
(b) $A=B=C=1$
(c) $A=B=C=0$.
Solution:
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