题目想问 F = AB + BC + AC 吧？
F = AB + BC + AC = ( (AB)' (BC)' (AC)' )' 。与非-与非
F = AB + BC + AC = ( (AB)' (BC)' (AC)' )' = ( (A‘+B‘) (B‘+C‘) (A‘+C‘) )' = ( A'B' + B'C' + A'C' )' 。与-或非
F = AB + BC + AC = ( (AB)' (BC)' (AC)' )' = ( (A‘+B‘) (B‘+C‘) (A‘+C‘) )' = ( A'B' + B'C' + A'C' )' = ( (A+B)' + (B+C)' + (A+C)' )' 。或非-或非
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