网页上敲不出 “非”运算符,以 单撇号 ' 表示。那么有:
Y = AB'CD + ABD + AC'D
= AD(B'C + B + C')
= AD[B'C + B(C+C') + C'] 注:1 = C + C'
= AD[B'C + BC + BC' + C']
= AD[(B'+B)C + (B+1)C']
= AD[1 * C + 1 * C'] 注:B'+B=1, B+1 = 1
= AD(C+C')
= AD 注:C+C' = 1
Y = AC' + ABC + ACD' + CD
= A(C'+BC) + C(D + AD')
= A[(1+B)C' + BC) + C[(1+A)D + AD'] 注:1+B=1, A+1=1
= A[C' + B(C'+C)] + C[D + A(D+D')]
= A(C' + B) + C(D+A) 注:C'+C=1, D+D'=1
= AC' + AB + DC + AC
= A(C' + C + B) + CD
= A(1+B) + CD 注:C'+C=1
= A + CD 注:1+B=1