20.設 x、y 為二元變數,x’, y’為其補數形式,⊕表 XOR 運算。若 ..-阿摩線上測驗
最佳解! | ||
2F i209209 小六上 (2019/07/19)
A = (x ⊕ y) ⊕ y’ A = (xy'+x'y) ⊕ y’ (把(xy'+x'y)當作一個新的變數z來看 z⊕ y'=zy'+z'y 較易理解) A =(xy'+x'y)'y'+ (xy'+x'y)y'' (展開後,可想成zy'+z'y) A=[(xy')'(x'y)']y'+xy'y+x'yy ( 利用(xy)'=x'+y' ;(x+y)'=x'y'化簡)(yy'=0;yy=y) A=[(x'+y)(x+y')]y'+x'y A=[xx'+x'y'+xy+yy']y'+x'y (xx'=0) A=[x'y'+xy]y'+x'y A=x'y'y'+xyy'+x'y A=x'y'+x'y A=x'(y'+y) (y'+y=1) A=x' |
3F
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