【巨蟹座】評論
假設x=0,y=0則補數 x'=1,y'=1
【i209209】評論
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'yA=[xx'+x'y'+xy+yy']y'+x'y (xx'=0)A=[x'y'+xy]y'+x'yA=x'y'y'+xyy'+x'yA=x'y'+x'yA=x'(y'+y) (y'+y=1)A=x'